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IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A phenomenon that occurs for large reverse voltages across a pn junction where the free electrons are accelerated to such high speeds that they can dislodge valence electrons.
a. Piezoelectric effectb. Zener Effectc. Recombinationd. Avalanche effect
ANSWER: d. Avalanche effect
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page # 985
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A graph showing the gain or phase performance of an electronic circuit at various frequencies.
a. Ogive graphb. Bode plotc. Gain-frequency curved. Performance graph
ANSWER: b. Bode plot
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #986
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
What do you call the ohmic resistance of the semiconductor?
a. Dynamic resistanceb. Static resistancec. Bulk resistanced. Semiconductor resistance
ANSWER: c. Bulk resistance
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #986
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
The metaphor used to describe the action of an SCR when it is used to protect a load against supply.
a. Surgeb. Limiterc. Breakerd. Crowbar
ANSWER: d. Crowbar
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #987
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A value that tells you how much to reduce the power rating for each degree above the reference temperature given on the data sheet.
a. Reduction factorb. Derating factorc. Temperature coefficientd. Attenuation
ANSWER: b. Derating factor
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #988
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is the process of adding impurity element to an intrinsic semiconductor to change its conductivity.
a. Impurificationb. Crystallizationc. Recombinationd. Doping
ANSWER: d. Doping
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #988
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A condition where the transistor is operating at the upper end of the load line with a base current that is one-tenth of the collector current.
a. Full saturationb. Hard saturationc. Mid saturationd. Avalanche
ANSWER: b. Hard saturation
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #989
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The pattern appearing on an oscilloscope when harmonically related signals are applied to the horizontal and vertical inputs.
a. Lissajous’ patternb. Shockley’s patternc. Braun’s patternd. Lee de Forest’s pattern
ANSWER: a. Lissajous’ pattern
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #991
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
7. Please Use One Page per Question. 8. Fill-out all needed information. 9. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A connection of two transistors connected with positive feedback to simulate the action of a thyristor.
a. Complementaryb. Latch c. Push pulld. Switch
ANSWER: b. Latch
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #990
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
7. Please Use One Page per Question. 8. Fill-out all needed information. 9. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It refers to the average amount of time between the creation and recombination of a free electron and a hole.
a. Recombination timeb. Delay timec. Conduction timed. Life time
ANSWER: d. Life time
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #990
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
10. Please Use One Page per Question. 11. Fill-out all needed information. 12. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A filter that blocks a signal with at most one frequency.
a. Brick wall filterb. Cauer filterc. Notch filterd. Butterworth filter
ANSWER: c. Notch filter
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #991
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
10. Please Use One Page per Question. 11. Fill-out all needed information. 12. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A term use to describe the death of amplification.
a. Oscillationb. Attenuationc. Degradationd. Hysteresis
ANSWER: a. Oscillation
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #992
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
13. Please Use One Page per Question. 14. Fill-out all needed information. 15. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The voltage that provides the border between the ohmic region and the constant current region of a depletion-mode device when the gate to source voltage is zero.
a. Threshold voltageb. Peak point voltagec. Valley point voltaged. Pinch off voltage
ANSWER: d. Pinch off voltage
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #992
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
13. Please Use One Page per Question. 14. Fill-out all needed information. 15. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A basic circuit that a designer can modify to get more advanced circuits.
a. Model circuitb. Miniature circuitc. Prototype d. Hybrid
ANSWER: c. Prototype
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #993
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
16. Please Use One Page per Question. 17. Fill-out all needed information. 18. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is a comparator with hysteresis.
a. Schmitt triggerb. Hysteresis circuitc. Trigger-comparatord. Latch circuit
ANSWER: a. Schmitt trigger
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #993
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
16. Please Use One Page per Question. 17. Fill-out all needed information. 18. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following special purpose diode doesn’t have depletion layer?
a. Tunnel diodeb. Schottky diodec. Varactor dioded. Zener diode
ANSWER: b. Schottky diode
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #993
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is define as a large initial current that flows through the diode of a rectifier.
a. Bleeder currentb. Surge currentc. Transient currentd. Saturated current
ANSWER: b. Surge current
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #994
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is defined as a four-layer semiconductor device that acts as a latch.
a. Thyrectorb. Transistorc. Transformerd. Thyristor
ANSWER: d. Thyristor
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #995
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is the value of the input voltage that switches the output of a comparator.
a. Trigger b. Trip pointc. Latch d. Knee
ANSWER: b. Trip point
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #995
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is a device that acts like two back-to-back-zener diodes.
a. Varistorb. Varactorc. Complementary zenerd. Zener latch
ANSWER: a. Varistor
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #996
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What do you call a thin slice of crystal used as a chassis for integrated components.
a. Substrateb. Basec. Waferd. Impurity
ANSWER: c. Wafer
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #996
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What is the other term for zener effect?
a. Avalanche effectb. Piezoelectric effectc. High field emissiond. Breakdown effect
ANSWER: c. High field emission
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #996
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the efficiency of a transformer-coupled class A amplifier for a supply of 12 V and outputs of 6V.
a. 50% b. 25% c. 12.5% d. 10%ANSWER: c. 12.5%
SOLUTION ( IF PROBLEM -SOLVING)
V CEMAX=V CEQ+V ( p )=12V +6V=18V
V CEMIN=V CEQ−V ( p )=12V −6V=6V
Resulting in
% η=50( 18V−6V18V +6V )
2
%=12.5%
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #673
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:For a class B amplifier providing a 20-V peak to a 16-Ω load (speaker) and a power supply of Vcc = 30 V, determine the circuit efficiency.
a. 45.2% b. 66.67% c. 78.5% d. 52.3%ANSWER: d. 52.3%SOLUTION ( IF PROBLEM -SOLVING)
I L ( p )=V L( p)
RL
=20V16
=1.25 A
I DC=2π
I L ( p )=2π
(1.25 A )=0.796 A
Pi (dc )=V CC I dc=(30V ) (0.796 A )=23.9W
Po (ac )=V 2
L
2RL
=¿¿
For resulting efficiency of
% η=Po(ac )Pi ¿¿
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #676
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:For a class B amplifier using a supply of Vcc = 30 V and driving a load of 16Ω, determine the maximum output power.
a. 28.13W b. 35.81W c. 41.23W d. 54.91WANSWER: b.35.81W
SOLUTION ( IF PROBLEM -SOLVING)
Maximum Pi (dc )=2V2cc
πRL=2(30V )2
π (16)=35.81W
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #677
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:For a class B amplifier using a supply of Vcc = 30 V and driving a load of 16Ω, determine the transistor dissipation
a. 3.7W b. 4.7W c. 5.7W d. 6.7WANSWER: c. 5.7W
SOLUTION ( IF PROBLEM -SOLVING)
Maximum Po=maximum P2Q
2=0.5( 2V 2
cc
π 2RL)=0.5[ 2(30V )2
π216 ]=5.7W
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #677
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the efficiency of a class B amplifier for a supply of Vcc = 24 V with peak output voltages of VL (p) = 22 V.
a. 62% b. 68% c. 72% d. 78%ANSWER: c. 72%
SOLUTION ( IF PROBLEM -SOLVING)
a. % η=78.54V L(P)
V CC
%=78.54 ( 22V24V )=72%
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #677
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the total harmonic distortion for the following amplitude components: fundamental amplitude of 2.5 V, second harmonic amplitude of 0.25 V, third harmonic amplitude of 0.1 V, and fourth harmonic amplitude of 0.05 V.
a. 11% b. 12% c. 13% d. 14%ANSWER: a. 11%SOLUTION ( IF PROBLEM -SOLVING)
%D 2=|A2||A1|
×100%=0.25V2.5V
×100%=10%
%D 3=|A3||A1|
×100%=0.1V2.5V
×100%=4%
%D 4=|A4||A1|
×100%=0.05V2.5V
×100%=2%
%THD=√ D22+D3
2+D42×100%
¿√ (0.10 )2+(0.04 )2+ (0.02 )2×100%=0.1095×100%¿10.95%
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #684
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Determine what maximum dissipation will be allowed for an 80-W silicon transistor (rated at25) if the reading is required above 25 by a derating factor of 0.5W/ at case temperature of 125.
a. 25W b. 30W c. 35W d. 40WANSWER: b. 30W
SOLUTION ( IF PROBLEM -SOLVING)PD (125 )=PD (25 )−(125−25 ) (0.5W / )
¿80W −100 (0.5W / )=30W
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #688
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A silicon power transistor is operated with a heat sink (θSA=1.5 /W ) .the transistor, rated at150 W (25 ) , hasθCS=0.5 /W , and the mounting insulation has θCS=0.6 /W . What maximum power can be dissipated if the ambient temperature is40∧T Jmax
=200?
a. 61.5W b. 71.5W c. 81.5W d. 91.5WANSWER: a. 61.5W
SOLUTION ( IF PROBLEM -SOLVING)
PD=T J−T A
θJC+θCS+θSA
= 200−400.5/W +0.6/W +1.5 /W
≈61.5W
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #690
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A dc voltage supply provides 50 V when the output is unloaded. When connected to a load, the output drops to 56 V. Calculate the value of voltage regulation.
a. 4.1% b. 7.1% c. 5.7% d. 10.7%ANSWER: b. 7.1%
SOLUTION ( IF PROBLEM -SOLVING)
%V . R .=V NL−V FL
V FL
×100%=60V −56V56V
×100%=7.1%
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #765
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the ripple voltage of a full-wave rectifier with a 100-μF filter capacitor connected to a load drawing to a load drawing 50 mA
a. 1.2V b. 2.5V c. 2.7V d. 3.1VANSWER: a. 1.2V
SOLUTION ( IF PROBLEM -SOLVING)
V r (rms )=2.4 (50 )100
=1.2V
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #767
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the filter dc Voltage of a full-wave rectifier with a 100-μF filter capacitor connected to a load drawing to a load drawing 50 mA if the peak rectifier voltage is 30 V.
a. 25.4V b. 26.1V c. 27.9V d. 28.6VANSWER: c. 27.9V
SOLUTION ( IF PROBLEM -SOLVING)
V dc=V m−4.17 Idc
C=30−
4.17 (50 )100
=27.9V
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #768
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the ripple of a capacitor filter for a peak rectified voltage of 30 V, capacitor C= 100μF, and a load current of 50 mA.
a. 3.7% b. 4.3% c. 5.1% d. 6.9%ANSWER b. 4.3%
SOLUTION ( IF PROBLEM -SOLVING)
r=2.41 I dc
CV dc
×100%=2.4 (50 )100 (27.9 )
×100%=4.3%
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #768
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the input bias currents at the non-inverting and inverting terminal respectively of an op=amp having specified values of IIO = 5nA and IIB = 30 nA.
a. Both 32.5nA b. Both 27.5nA c. 27.5nA; 32.5nA d. 32.5nA; 27.5nAANSWER: d. 32.5nA; 27.5nA
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #608
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
Determine the cutoff frequency of an op-amp having specified values B1 = 1 MHz and AVD = 200 V/mV.
a. 4Hz b. 5Hz c. 1kHz d. 1MHzANSWER: b. 5Hz
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #609
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
For an op-amp having a slew rate of SR = 2V/µs, what is the maximum closed loop voltage gain that can be used when the input signal varies by 0.5 V in 10 µs?
a. 10 b. 20 c. 30 d. 40ANSWER: d. 40
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #610
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Determine the output voltage of an op-amp for input voltages of Vi1 = 150 µV and Vi2 = 140 µV. The amplifier has a differential gain of Ad =4000 and the value of CMRR is 100.
a. 32.6mV b. 45.8mV c. 51.9mV d. 66.7mVANSWER: b. 45.8mV
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #619
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:If an amplifier with gain of -1000 and feedback of β=-0.1 has a gain change of 20% due to temperature; calculate the change in gain of the feedback amplifier
a. 10% b. 0.2% c. 20% d. 1%ANSWER b. 0.2%
SOLUTION ( IF PROBLEM -SOLVING)
|dA f
A f|≅| 1βA||dA
A |=| 1−0.1 (−1000 )|(20%) = 0.2%
Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #737
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A transistor has a collector current of 10mA and a base current of 40uA. What is the current gain of the transistor
a. 20 b. 30 c. 40 d. 50ANSWER: d. 50
SOLUTION ( IF PROBLEM -SOLVING)β=10mA/40uA=50
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #194
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A 2N3904 has VCE=10V and IC=20mA. What is the power dissipation?
a. 0W b. 100mW c. 200mW d. 2N3904 is limited to 10mW ANSWER: c. 200mW
SOLUTION ( IF PROBLEM -SOLVING)PD=10V(20mA)=200mW
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #210
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A zener regulator has an input voltage that may vary from 22 to 30V. If the regulated output voltage is 12V and the load resistance varies from 140Ω to 10kΩ, what is the maximum allowable series resistance?
a. 140Ω b. 76.4 Ω c. 280 Ω d. 117 ΩANSWER: d. 117 Ω
SOLUTION ( IF PROBLEM -SOLVING)
R=( 2212−1)140Ω=117Ω
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #160
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
It is sometimes called hot-carrier diode.
a. Shockley diodeb. Schottky diodec. Gunn Dioded. Tunnel diode
ANSWER: b. Schottky diode
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #174
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A zener regulator has an input voltage ranging from 15 to 20V and a load current ranging from 5 to 20mA. If the zener voltage is 6.8V, what is the maximum allowable series resistance?
a. 750Ω b. 410 Ω c. 1000Ω d. 2000 ΩANSWER b. 410 Ω
SOLUTION ( IF PROBLEM -SOLVING)
R=( 15−6.820mA )=410Ω
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #160
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A 2N5668 has VGS(off)=-4V and IDSS=5mA. What are the gate voltage and drain current at the half cutoff point?
a. -1V; 1mA b. -2V; 1.25mA c. -4V; 5mA d. 0; 0ANSWER: b. -2V; 1.25mA
SOLUTION ( IF PROBLEM -SOLVING)
VGS=−4 V2
=−2V
ID=5mA4
=1.25mA
Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #428
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A network that employ diodes to remove away a portion of an input signal without distorting the remaining part of the applied waveform
a. Clamperb. Rectifierc. Regulatord. Clipper
ANSWER: d. clipper
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #82
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
Atom with four valence electrons is called ____.
a. Trivalentb. Tetravalentc. Quadvalentd. Pentavalent
ANSWER: b. Tetravalent
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #7
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
The term applied to any semiconductor material that has been carefully refined to reduce the number of impurities to a very low-essentially as pure as can be made available through modern technology.
a. Intrinsicb. Crystalc. Latticed. Solid
ANSWER: a. Intrinsic
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #3
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
Who discovered electrons in 1897?
a. J. Thompsonb. E. Rutherfordc. J. Chadwickd. J. Maxwell
ANSWER: a. J. Thompson
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #1
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
What is the typical energy gap of silicon semiconductor?
a. 0.03eV b. 0.67eV c. 1.1eV d. 1.43eVANSWER: c. 1.1eV
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #8
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
Which of the following semiconductor material is sensitive to temperature change?
a. Carbonb. Germaniumc. Silicond. GaAs
ANSWER: b. Germanium
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #1
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
It occurs when a conduction-band electron loses energy and falls back into a hole in the valence band.
a. Ionizationb. Dopingc. Electron-holed. Recombination
ANSWER: d. Recombination
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #10
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following is not a pentavalent atom?
a. Phosphorusb. Antimonyc. Arsenicd. Boron
ANSWER: d. Boron
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #8
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How does minority carriers produced?
a. Dopingb. Ionizationc. Thermally producedd. Light energy
ANSWER: c. Thermally produced
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #11
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is an extremely small amount of current that exists in a reverse biased diode.
a. Forward saturated currentb. Reversed saturated currentc. Forward leakage currentd. Zener current
ANSWER: b. Reversed saturated current
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #11
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
What is the typical reverse saturated current of a silicon diode?
a. 1uA b. 10uA c. 10pA d. 1pAANSWER: c. 10pA
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #15
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
What is the typical range of reverse breakdown voltage of silicon diode?
a. 2-200Vb. 50-1kVc. 50-400Vd. 100-10kV
ANSWER: b. 50-1kV
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #15
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
The time required for the minority carriers to return to the majority carrier state in the opposite material.
a. Transition timeb. Time constantc. Rise time d. Storage time
ANSWER: d. Storage time
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #31
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
Determine the thermal voltage of a diode at 27°C (common temperatures for components in an enclosed operating system)
a. 20mV b. 26mV c. 30mV d. 1VANSWER: b. 26mV
SOLUTION ( IF PROBLEM -SOLVING)Vt =kT/q=(1.38x10-23J/K)(273+17)/1.6x10-19C = 26mV
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #13
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
What is the knee voltage of a silicon diode at 75°C?
a. 0.7V b. 2.1V c. 0.58V d. 0VANSWER: c. 0.58V
SOLUTION ( IF PROBLEM -SOLVING)(75-25)°C*2.5mV/°C = 0.125V
New Vknee = 0.7-0.125 = 0.575V
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #18
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
At 20°C, the reverse saturation current of a silicon diode is 10nA, what is its value when the temperature increases to 100°C?
a. 0.32uA b. 50nA c. 10nA d. 0AANSWER: a. 0.32uA
SOLUTION ( IF PROBLEM -SOLVING)100 °C / 20°C = 5
New Ireverse = 25(10nA)= 0.32uA
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #18
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
A silicon diode is in series with 1kΩ resistor and a forward biasing voltage supply of 10V. If r’d is 10Ω, what is the anode to cathode current and voltage?
a. 9.3mA, 0.7Vb. 9.3mA,0.79Vc. 9.21mA,0.7Vd. 9.21mA,0.79V
ANSWER: d. 9.21mA,0.79V
SOLUTION ( IF PROBLEM -SOLVING)IF=(10-0.7)/(10+1k)=9.21mAVF=0.7+10(9.21mA=0.79V
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #68
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:
What is the wavelength of the light produced by an LED with an energy gap level of 1.43 eV?
a. 569nmb. 669nmc. 768nmd. 869nm
ANSWER: d. 869nm
SOLUTION ( IF PROBLEM -SOLVING)λ=hc/Eg =(6.626x10-34Js*3x108m/s) /(1.43eV*1.6x10-19J/eV) = 869nm
Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #44
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What does FPGA stands for?
a. Field p-type gate arrayb. Field programmable gate arrangementc. Field programmable gate arrayd. FET programmable gate array
ANSWER: c. Field programmable gate array
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#40
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Find the 2’s complement of 10110010.
a. 01001101b. 01001100c. 11001101d. 10111101
ANSWER: a. 01001101
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#60
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Convert the binary number 11000110 to gray code
a. 1011101b. 10100111c. 10000101d. 10100101
ANSWER: d. 10100101
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#89
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following can be used as universal gate?
a. ANDb. ORc. NANDd. NOT
ANSWER: c. NAND
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#129
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A logic gate that produces a HIGH output only when its two inputs are at opposite levels.
a. ORb. XORc. NORd. XNOR
ANSWER: b. XOR
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#168
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The complement of a sum of variables is equal to the product of the complements of the variables.
a. Boolean’s Ruleb. De Morgan’s Theoremsc. Baudot’s Lawd. Karnaugh’s Rule
ANSWER: b. De Morgan’s Theorems
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#191
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following expression is in standard SOP form?
a. F=ABC+AB’C+A’B’C’b. F=A’+BC+ABC’c. F=AB+AC+BCd. All of the above
ANSWER: a. F=ABC+AB’C+A’B’C’
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#200
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
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Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:In a 4 variable K-map, what is the binary value for the cell in the lower right corner?
a. 0000b. 1111c. 0101d. 1010
ANSWER: d. 1010
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#211
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is a digital circuit that adds two bits and an input carry to produce a sum and an output carry.
a. Half adderb. Full adderc. Demultiplexerd. Encoder
ANSWER: b. Full adder
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#354
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
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Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following is the invalid state for RS flip flop?
a. S=0; R=0b. S=0; R=1c. S=1; R=0d. S=1; R=1
ANSWER: d. S=1; R=1
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#379
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:In T flip flop, T stands for:
a. Timeb. Tripc. Transientd. Toggle
ANSWER: d. Toggle
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#371
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
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PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How many flip-flop/s is/are need to produce 2kHz frequency from 8kHz input?
a. 1 b. 2 c.3 d. 4ANSWER: b. 2
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#394
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A flip-flop is in the toggle condition when:
a. J=0; K=0b. J=0; K=1c. J=1; K=0d. J=1; K=1
ANSWER: d. J=1; K=1
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#414
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How many flip-flops are needed to produce 4-bit asynchronous counter?
a. 2 b. 4 c. 6 d. 8ANSWER: b. 4
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#431
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How many flip-flops are needed to produce modulus-12 asynchronous counter?
a. 4 b. 8 c. 12 d. 10ANSWER: a. 4
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#434
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What do you call the number of unique states through which a counter will sequence?
a. Stateb. Sequencec. Modulusd. Counts
ANSWER: c. Modulus
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#480
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Asynchronous counters are known as:
a. ripple counters b. multiple clock counters c. decade countersd. modulus counters
ANSWER: a. ripple counters
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#427
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The modulus of a counter is
(a) the number of flip-flops (b) the actual number of states in its sequence (c) the number of times it recycles in a second (d) the maximum possible number of states
ANSWER: b. the actual number of states in its sequence
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#481
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Three cascaded modulus-10 counters have an overall modulus of
a. 30 b. 100 c. 1000 d. 10000ANSWER: c. 1000
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#481
IECEP-Manila Form 1 S.2011 TEST QUESTIONS
1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.
PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position
Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)
Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The terminal count of a modulus-13 binary counter is
a. 0000b. 1111c. 1101d. 1100
ANSWER: d. 1100
SOLUTION ( IF PROBLEM -SOLVING)
Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#481