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e-MCL / ECE198 - Correlation / Quizzes / Drill 4 / Review of attempt 1
Question 1 Marks: 1 Stokes theorem is applied over a surface enclosed by a closed curve.Choose one answer.
a. TRUE
b. FALSE CorrectMarks for this submission: 1/1.Question 2 Marks: 1 The gain reduction in operational amplifier is known asChoose one answer.
a. gain-off
b. attenuation
c. roll-off
d. back-off CorrectMarks for this submission: 1/1.Question 3 Marks: 1 A diac has how many semiconductor layers?Choose one answer.
a. Four
b. Three
c. Five
d. Two CorrectMarks for this submission: 1/1.Question 4 Marks: 5 Which circuit has an input impedance of about 5 kΩ?
Choose one answer.
a. (a)
b. None of the above
c. (c)
d. (b) IncorrectMarks for this submission: 0/5.Question 5 Marks: 1 Power electronics deals with the control of ac power at what frequencies essentially?Choose one answer.
a. Frequencies less than 10 Hz
b. 60 Hz frequency
c. 20 kHz
d. 1000 kHz CorrectMarks for this submission: 1/1.Question 6 Marks: 2 An integrator circuitChoose one answer.
a. produces a ramp voltage at its output for a step input voltage.
b. uses a capacitor in its feedback circuit.
c. uses an inductor in its feedback circuit.
d. A and B above. CorrectMarks for this submission: 2/2.Question 7
Marks: 1 A UJT is sometimes called a _________ diode.Choose one answer.
a. single-based
b. a rectifier
c. a switching diode
d. double-based CorrectMarks for this submission: 1/1.Question 8 Marks: 1 OTA stands for operational transistor amplifier.Choose one answer.
a. True
b. False CorrectMarks for this submission: 1/1.Question 9 Marks: 5
Given the Vector field and point Q(3,4,-1): Determine the unit vector in the direction if the vector field at point Q within the same field.Choose one answer.
a.
b.
c.
d. CorrectMarks for this submission: 5/5.Question 10 Marks: 2
Given vector and , Calculate the cross product Choose one answer.
a.
b.
c.
d.
In diagnostic radiology and for superficial therapy purposes, the energy spectrum of radiation varies from aboutChoose one answer.
a. 10000 to 100000 keV
b. 10 to 100 keV
c. 100 to 10000 keV
d. 1 to 10 keV CorrectMarks for this submission: 1/1.Question 2 Marks: 1 The package suffix code for ceramic dual-in-line isChoose one answer.
a. D
b. N
c. J
d. P CorrectMarks for this submission: 1/1.Question 3 Marks: 5 A voltage-to-current converter is used in application where it is necessary to have an output load current that is controlled byChoose one answer.
a. output resistance
b. input voltage
c. input resistance
d. input frequency CorrectMarks for this submission: 5/5.Question 4 Marks: 1 What has been considered as the industry standard of linear Ics?Choose one answer.
a. LM 317
b. 741 op-amp
c. LM 340
d. 555 timer CorrectMarks for this submission: 1/1.Question 5 Marks: 5 The ________ input makes the summing amplifier circuit possible.Choose one answer.
a. high voltage
b. virtual ground at the inverting
c. low voltage
d. virtual ground at the noninverting CorrectMarks for this submission: 5/5.Question 6 Marks: 2 A device is needed to trigger an SCR. One possible device to use might be a ( n )Choose one answer.
a. SCR
b. PUT
c. Schockley diode
d. UJT CorrectMarks for this submission: 2/2.Question 7 Marks: 2 If R1, VOUT would
Choose one answer.
a. cannot be determined
b. remain the same
c. increase
d. decrease to zero CorrectMarks for this submission: 2/2.
Question 8 Marks: 1 Plastic dual-in-line for insertion into sockets has a package suffix code ofChoose one answer.
a. Both A and B
b. J
c. N
d. P CorrectMarks for this submission: 1/1.Question 9 Marks: 1 When the supply voltage exceeds the breakover voltage of an SCR, itChoose one answer.
a. starts conducting
b. stops conducting
c. conducts thermal current
d. conducts leakage current CorrectMarks for this submission: 1/1.Question 10 Marks: 1 The SCR can exercise control over _____ of ac supplyChoose one answer.
a. only positive half-cycle
b. positive or negative half-cycle
c. only negative half-cycle
d. both positive and negative half-cycles
Feedback PASSEDQuestion 1 Marks: 1 In most modern IC op-amps, the 741 requires _______ power suppliesChoose one answer.
a. 1
b. 3
c. 2
d. 4 CorrectMarks for this submission: 1/1.Question 2
Marks: 1 A basic isolation amplifier has two electrically isolated sections.Choose one answer.
a. True
b. False CorrectMarks for this submission: 1/1.Question 3 Marks: 2 If R1 = R2 = 30 kΩ and the closed loop gain is 450, the value of the external gain-setting resistor RG is
Choose one answer.
a. 133.63Ω
b. 133.63kΩ
c. 13.36Ω
d. None of the above CorrectMarks for this submission: 2/2.Question 4 Marks: 1 When an SCR is compared to a switch, it is considered as a _____ switch.Choose one answer.
a. mechanical
b. unidirectional
c. omnidirectional
d. bidirectional CorrectMarks for this submission: 1/1.Question 5 Marks: 1 The divergence of a field will result to the maximum and the minimum rate of change.Choose one answer.
a. TRUE
b. FALSE CorrectMarks for this submission: 1/1.Question 6 Marks: 5 An op-amp has an open-loop gain of 90,000. Vsat = +/-13 V. A differential voltage of 0.1 Vp-p is applied between the inputs. The output voltage isChoose one answer.
a. 26 Vp-p
b. 13 Vp-p
c. 13 V
d. -13 V CorrectMarks for this submission: 5/5.Question 7 Marks: 2 This circuit is known as a
Choose one answer.
a. comparator with hysteresis
b. zero level detector
c. multivibrator
d. noninverting amplifier CorrectMarks for this submission: 2/2.Question 8 Marks: 1 Linear signal compression scales down all signal levels by the same amount.Choose one answer.
a. False
b. True CorrectMarks for this submission: 1/1.Question 9 Marks: 5
If a solder splash shorted the two end of the feedback resistor to each other, the output voltage would be
Choose one answer.
a. 0.5V
b. -Vsat
c. -0.5V
d. 0 V CorrectMarks for this submission: 5/5.Question 10 Marks: 1 What is the purpose of a comparator in op-amps?Choose one answer.
a. To detect the occurrence of a changing input voltage.
b. To amplify an input voltage.
c. To maintain a constant output when the dc input voltage changes.
d. To produce a change in output when an input voltage equals a referebce voltage. CorrectMarks for this submission: 1/1.
Feedback PASSEDQuestion 1 Marks: 2 With both inputs grounded, the only offset that produces an error is theChoose one answer.
a. input offset current
b. input offset voltage
c. input short circuit current
d. input bias current IncorrectMarks for this submission: 0/2.Question 2 Marks: 2 A Shmitt trigger is a comparator with
Choose one answer.
a. hysteresis
b. two trigger points
c. A and B above
d. one trigger points CorrectMarks for this submission: 2/2.Question 3 Marks: 5 A voltage-to-current converter is used in application where it is necessary to have an output load current that is controlled byChoose one answer.
a. output resistance
b. input frequency
c. input voltage
d. input resistance CorrectMarks for this submission: 5/5.Question 4 Marks: 1 A good op-amp has high voltage gain, low output impedance, and high input impedanceChoose one answer.
a. True
b. False CorrectMarks for this submission: 1/1.Question 5 Marks: 1 The gain reduction in operational amplifier is known asChoose one answer.
a. roll-off
b. attenuation
c. gain-off
d. back-off CorrectMarks for this submission: 1/1.Question 6 Marks: 1 What is the type of vector that starts from the origin and ends at a specific point in space?Choose one answer.
a. Position
b. Unit
c. Resultant
d. Difference CorrectMarks for this submission: 1/1.Question 7 Marks: 1 The triac is fundamentally a/an _______ with a gate terminal for controlling the turn-on coditions of the bilateral device in either direction.Choose one answer.
a. SCR
b. Diac
c. Quadrac
d. Schockley CorrectMarks for this submission: 1/1.Question 8 Marks: 1 The SCR is a device that can be triggered on ny a pulse applied to the gate.Choose one answer.
a. True
b. False CorrectMarks for this submission: 1/1.Question 9 Marks: 1 A diac is turned on byChoose one answer.
a. gate voltage
b. anode current
c. gate current
d. breakover voltage CorrectMarks for this submission: 1/1.Question 10 Marks: 5
An increase in VOUT will cause Q1 to
Choose one answer.
a. conduct more
b. conduct the same
c. conduct less
d. open CorrectMarks for this submission: 5/5.
Feedback PASSEDQuestion 1 Marks: 1 The three terminals of an SCR are theChoose one answer.
a. cathode, anode, gate
b. anode, cathode, drain
c. drain, source, gate
d. anode, cathode, grid CorrectMarks for this submission: 1/1.Question 2 Marks: 5 To get more output voltage from astep-down switching regulator, you have toChoose one answer.
a. increase the switching frequency
b. increase the duty cycle
c. decrease the duty cycle
d. decrease the input voltage CorrectMarks for this submission: 5/5.Question 3 Marks: 1 A feedback control system in which the controlled variable is mechanical position.Choose one answer.
a. Mechanical servomechanism
b. Closed-loop feedback control system
c. Open-loop feedback control system
d. Servomechanism CorrectMarks for this submission: 1/1.Question 4 Marks: 1 Refers to a quantity whose value may be represented by a single real number.Choose one answer.
a. Scalar
b. Field
c. Vector
d. Direction CorrectMarks for this submission: 1/1.Question 5 Marks: 5 For a given op-amp, which of these is constant?Choose one answer.
a. AOL fc(OL)
b. fC(CL)
c. feedback voltage
d. AOL CorrectMarks for this submission: 5/5.Question 6 Marks: 2 The purpose for an op-amp is to
Choose one answer.
a. limit the input voltage to the circuit
b. sense the error signal
c. supply reference voltage
d. amplify the error signal CorrectMarks for this submission: 2/2.Question 7 Marks: 1 Which is equivalent to the zener or avalanche region of the fundamental two-layer semiconductor diode?Choose one answer.
a. Forward breakdown voltage
b. Breakdown voltage
c. Breakover voltage
d. Reverse breakdown voltage CorrectMarks for this submission: 1/1.Question 8 Marks: 1 An SCR combines the feature ofChoose one answer.
a. a rectifier of inductor
b. a rectifier of capacitor
c. a rectifier of resistance
d. a rectifier and transistor CorrectMarks for this submission: 1/1.Question 9 Marks: 2 An SCR crowbar circuit is used toChoose one answer.
a. detect when a circuit is overheating
b. control three phase ac motors
c. protect against overvoltage conditions
d. protect against undervoltage conditions CorrectMarks for this submission: 2/2.Question 10 Marks: 1 What is the most commonly used type of linear IC?Choose one answer.
a. LM 340
b. 741 op-amp
c. Operational amplifier
d. 555 timer CorrectMarks for this submission: 1/1.
Feedback FAILEDQuestion 1 Marks: 5
The formula shows that for a given capacitor, if the voltage changes at a constant rate with repect to time, the current willChoose one answer.
a. decrease.
b. be constant.
c. increase.
d. decrease logarithmically. CorrectMarks for this submission: 5/5.Question 2 Marks: 5
Given vector and point P(-2,4,-1): What is radial vector component of at PChoose one answer.
a.
b.
c.
d. CorrectMarks for this submission: 5/5.Question 3 Marks: 1 In diagnostic radiology and for superficial therapy purposes, the energy spectrum of radiation varies from aboutChoose one answer.
a. 1 to 10 keV
b. 10000 to 100000 keV
c. 100 to 10000 keV
d. 10 to 100 keV CorrectMarks for this submission: 1/1.Question 4 Marks: 2 A triac is used for ac becauseChoose one answer.
a. it conducts on both alterations
b. it can deliver more to the load in a cycle
c. All of the above
d. it is turned of when the ac voltage reaches zero IncorrectMarks for this submission: 0/2.Question 5 Marks: 1 An effect that reduces the possibility of accidental triggering of the SCS.Choose one answer.
a. Rate effect
b. End effect
c. Flywheel effect
d. Miller effect CorrectMarks for this submission: 1/1.Question 6 Marks: 2 The 7912 produces a regulated output voltage ofChoose one answer.
a. +9 V
b. +5V
c. +12 V
d. -12 V IncorrectMarks for this submission: 0/2.Question 7 Marks: 1 The p-type emitter of a UJT is _______ doped.Choose one answer.
a. heavily
b. not
c. lightly
d. moderately CorrectMarks for this submission: 1/1.Question 8 Marks: 1 The x-ray region of the eletromagnetic spectrum has a corresponding range of wavelengths fromChoose one answer.
a. 0.1 to 0.0001 µm
b. 0.1 to 0.0001 nm
c. 0.1 to 0.0001 pm
d. 0.1 to 0.0001 mm CorrectMarks for this submission: 1/1.Question 9 Marks: 1 A silicon controlled rectifier hasChoose one answer.
a. two external leads
b. three doped regions
c. three axternal leads
d. four external leads CorrectMarks for this submission: 1/1.Question 10 Marks: 1 When an SCR is compared to a switch, it is considered as a _____ switch.Choose one answer.
a. bidirectional
b. unidirectional
c. mechanical
d. omnidirectional CorrectMarks for this submission: 1/1.
Feedback PASSEDQuestion 1 Marks: 1 Which of the following is not part of the three temperature-range codes of op-amps for commercia, industrial and military applications?Choose one answer.
a. -55 to 125oC
b. -25 to 85oC
c. -30 to 200oC
d. 0 to 70oC CorrectMarks for this submission: 1/1.Question 2 Marks: 1 One ot the key characteristics of an instrumentation amplifier is its low input impedance.Choose one answer.
a. True
b. False CorrectMarks for this submission: 1/1.Question 3 Marks: 2 Which of these circuits contains an OTA?
Choose one answer.
a. (b)
b. (c)
c. (d)
d. (a) CorrectMarks for this submission: 2/2.Question 4 Marks: 1 Most modern isolation amplifiers use transformer coupling for isolation.Choose one answer.
a. False
b. True CorrectMarks for this submission: 1/1.Question 5 Marks: 1 For most commercial and industrial applications, Ics are tested in the temperature range ofChoose one answer.
a. -55oC to + 125oC
b. 0oC to + 70oC
c. -10oC to + 25oC
d. -173oC to + 100oC CorrectMarks for this submission: 1/1.Question 6 Marks: 5 A voltage-to-current converter is used in application where it is necessary to have an output load current that is controlled byChoose one answer.
a. input frequency
b. input resistance
c. input voltage
d. output resistance CorrectMarks for this submission: 5/5.Question 7 Marks: 1 Which of the choices below are sources of output offset voltage?Choose one answer.
a. All of the choices
b. The difference in VCE values
c. The differences in transistor voltage
d. The difference in VBE values CorrectMarks for this submission: 1/1.Question 8 Marks: 5
Given vectors and
What is vector ?
Choose one answer.
a.
b.
c.
d. CorrectMarks for this submission: 5/5.Question 9 Marks: 1 What is the typical total power dissipated by the operational amplifier?Choose one answer.
a. 5 mW
b. 500 mW
c. 0.5 mW
d. 50 mW CorrectMarks for this submission: 1/1.Question 10 Marks: 2
Which circuit is the inverting amplifier?
Choose one answer.
a. (c)
b. (b)
c. (a)
d. None of the above CorrectMarks for this submission: 2/2.
Feedback PASSEDQuestion 1 Marks: 1 An antilog amplifier has a BJT in series with the input.Choose one answer.
a. False
b. True CorrectMarks for this submission: 1/1.Question 2 Marks: 5 The voltage gain of an isotlation amplifier is 49. If the voltage gain of the input and outpu stages are equal, the voltage gain for each other isChoose one answer.
a. 4.9
b. 7
c. 24.5
d. 9.8 CorrectMarks for this submission: 5/5.Question 3 Marks: 5 A voltmeter placed from the inverting input to ground would read.
Choose one answer.
a. 2.775V
b. -0.925V
c. ≈0 V
d. -2.775V CorrectMarks for this submission: 5/5.Question 4 Marks: 1 For most commercial and industrial applications, Ics are tested in the temperature range ofChoose one answer.
a. -55oC to + 125oC
b. 0oC to + 70oC
c. -10oC to + 25oC
d. -173oC to + 100oC CorrectMarks for this submission: 1/1.Question 5 Marks: 1 Which of the following can change the angle of conduction in SCR?Choose one answer.
a. Changing gate voltage
b. Reverse biasing the gate
c. Changing anode voltage
d. Changing cathode voltage CorrectMarks for this submission: 1/1.Question 6 Marks: 2 In an op-amp integrator, the current through the input resistor is into theChoose one answer.
a. noninverting input
b. bypass capacitor
c. feedback capacitor
d. inverting input CorrectMarks for this submission: 2/2.Question 7 Marks: 1 In an op-amp integrator, the feedback path consist ofChoose one answer.
a. a resistor and a capacitor in series
b. an inductor
c. a capacitor
d. a resistor and a capacitor in parallel CorrectMarks for this submission: 1/1.Question 8 Marks: 1 An op-amp comparator has an output dependent upon the polarities of the two inputs.Choose one answer.
a. True
b. False CorrectMarks for this submission: 1/1.Question 9 Marks: 2 If Vsat = +/- 12V, the approximate output voltage is
Choose one answer.
a. 12V
b. -2V
c. 2V
d. -12V CorrectMarks for this submission: 2/2.Question 10 Marks: 1 What is summing point in op-amp?Choose one answer.
a. A terminal of the op-amp where the input resistors are commonly connected
b. Acts as a scaling defferentiator
c. Determines the rate of change of the integrator output voltage
d. Simulates mathematics integration CorrectMarks for this submission: 1/1.
Feedback PASSEDQuestion 1 Marks: 5 A voltmeter placed from the inverting input to ground would read.
Choose one answer.
a. ≈0 V
b. -0.925V
c. 2.775V
d. -2.775V CorrectMarks for this submission: 5/5.Question 2 Marks: 1 What is three terminal device used to control large current to a load?Choose one answer.
a. SCS
b. SCR
c. Thysistor
d. GTO CorrectMarks for this submission: 1/1.Question 3 Marks: 2 The closed-loop voltage gain of an inverting amplifier equalsChoose one answer.
a. the open-loop voltage gain
b. the ratio of the input resistance to the feedback resistance
c. the feedback resistance divided by the input resistance
d. the input resistance CorrectMarks for this submission: 2/2.Question 4 Marks: 1 Most op-amp circuit useChoose one answer.
a. positive feedback
b. closed-loop operation
c. negative feedback
d. open-loop operation CorrectMarks for this submission: 1/1.Question 5 Marks: 5
Given the Vector field and point Q(3,4,-1): Determine the unit vector in the direction if the vector field at point Q within the same field.Choose one answer.
a.
b.
c.
d. CorrectMarks for this submission: 5/5.Question 6 Marks: 1 Which of the following is a common application of UJT?Choose one answer.
a. Amplifier
b. Rectifier
c. sawtooth generator
d. multivibrator CorrectMarks for this submission: 1/1.Question 7 Marks: 1 In most modern IC op-amps, the 741 requires _______ power suppliesChoose one answer.
a. 3
b. 2
c. 1
d. 4 CorrectMarks for this submission: 1/1.Question 8 Marks: 2 A voltage regulator has a no load output of 18 V and a full load output of 17.3 V. The percent load regulation isChoose one answer.
a. 0.0405
b. 0.0104
c. 0.0025
d. 0.961 CorrectMarks for this submission: 2/2.
Question 9 Marks: 1 Upon what principle does a relaxation oscillator operate?Choose one answer.
a. Resistor in cascade
b. The rectification process of a diode
c. The charging and discharging of a capacitor
d. Switching transistors CorrectMarks for this submission: 1/1.Question 10 Marks: 1 bounding allows the op-amp to have unlimited output voltage to the value of supply voltages.Choose one answer.
a. False
b. True CorrectMarks for this submission: 1/1.