b2 module 3 test 4

MODULE 03 PRACTICE MCQ

http://www.aircrafttechtrng.com

1 ampere equals 1,000,000 milliamps 1,000,000 millicoulombs per second

1,000 milliamps

c

3 lights, each rated at 24 watts, are connected in parallel and supplied by a 12 volt battery. What total current does the battery need to deliver?

6 amperes 2 amperes 8 amperes

a

8 volts are applied to a 2 Ohm resistor. What current will flow?

4 coulombs 4 amps 24 watts b

A 10 V battery supplies a resistive load of 10 Ohm for 1 minute. What is the power supplied?

100 Watts 600 Joules 10 Watts c

A 10 V battery supplies a resistive load of 10 Ohm for 1 minute. What is the work done?

60 Joules 10 Watts 600 Joules c

A 12 volt battery is connected to a 24 watt light bulb. The battery lasts for 10 hrs. What is the battery capacity?

2 Amperes 20 Ampere hours 240 Watts

b

A 12V battery is connected to two resistors in series, (R1 and R2). If the voltage across R1 is 8V,

the resistance of R2 is double the resistance of R1

the current through R2 is half of the current through R1

the resistance of R2 is half the resistance of R1

c

A 2 Ohm resistor has 3 amps flowing through it. What is the voltage across the resistor?

0.67 volts 1.5 volts 6 volts c

A 2 Ohm resistor has 3 amps through it. What power is being consumed by the resistor?

18 joules per second 18 watts 6 watts b

A 20 pico Farad capacitor with a 1MW resistor takes how long to charge?

20 milli seconds 0.1 millisecond 10 seconds b

A 24 V battery has an internal resistance of 1 ohm. When connected to a load, 12 amps flow. The value of the load is

12 Ohm 1 ohm 1/2 ohm

b

A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of four resistors of equal value. What is the voltage drop across each resistor?

12 volts 24 volts 3 volts

b

A 3 ohm resistor dissipates 27 watts. How much current flows through it?

3 A 9 A 0.15 A a



A 3 phase system, with one end of each phase connected to a common neutral point, is known as

a delta connection a line connection a star connection c

A 30 KVA rated generator has a power factor of 0.8. What is its maximum consistent power?

30 KW 24 KW 375 KW b

A 3-phase AC generator has 3 separate stator windings spaced at

90 60 120 c

A 3-phase induction motor can be reversed by isolating one phase reversing the rotor connections

changing over any two phases

c

A 3-phase star-delta wound transformer gives 90 phase shift no phase shift 30 phase shift c

A 4:1 step-down transformer draws 1 A from a 200V supply. The output power will be

50V at 4 A 800V at 0.25A 50V at 0.25A a

A 400 Hz, 4-pole motor will rotate at 12,000 rpm 6,000 rpm 8,000 rpm a

A 500 ohm resistor carries a 3 amp current. What is the power dissipated?

5 kW 4.5 kW 500 W b

A band stop filter passes all frequencies above a specified value

attenuates frequencies either side of a narrow range

passes frequencies either side of a narrow range

c

A battery is made up of 5 NiCad cells connected in series. Each cell has a capacity of 20 Ah. What is the rating of the battery?

6 V; 20 Ah 30 V; 100 Ah 6 V; 100 Ah

a

A battery voltage "V" is connected to R1 and R2 that are in parallel. If R1 has 2 amps running through it and is twice the value (resistance) of R2 then the total current flowing from the battery is

3 amps 4 amps 6 amps

c

A battery voltage V and two resistors (R1 and R2) which are connected in series. If R1 is 2 Ohms and has 3 amps flowing through it, what current is flowing through R2?

impossible to tell without further information

3 amps 0.67 amps

b

A battery voltage V and two resistors (R1 and R2) which are connected in series. If R1 is 2 Ohms, V is 24 volts, what is the current through R1?


12 amps at least 12 amps

a



A capacitor connected to a 20V battery is fully charged after 25 seconds. If the battery is replaced with a short circuit, what will be the voltage across the capacitor after 1 time constant?

12.64 V 7.36 V 1 V

b

A charged body is said to have a surplus or lack of electrons

a surplus of protons a lack of neutrons a

A circuit comprises a 5ohm resistor connected in series with a 10 ohm resistor. If the current in the 5 ohm resistor is 1 A, what is the current in the 10 ohm resistor?

2 amps It cannot be found without knowing the applied voltage.

1 amp

c

A circuit comprising five resistors of different value have the same voltage dropped across each of them. The resistors are connected in

series parallel series/parallel

b

A circuit consists of three resistors of equal value connected in parallel. When connected to a 48V supply, the circuit dissipates 192 watts. What is the value of each resistor?

12 ohm 4 ohm 36 ohm

c

A circuit contains three resistors of equal value connected in parallel. If one resistor burns out (goes open circuit), the current in the each of remaining two resistors will

increase decrease remain the same

c

A component consuming 80 watts at 8 amps would require a supply of

10 Volts 100 Volts 5 Volts a

A conventional aircraft AC generator will be series wound delta wound star wound c

A Coulomb is a current flow of one ampere per second

one ampere x second one second per ampere b

A direct current of 12 milli-amperes flows through a circuit which has a resistance of 1000 ohm. The power dissipated by the circuit is

12 milliwatts 12 watts 144 milliwatts

c

A filter comprising a capacitor in series and inductor in parallel with the load is a

band pass filter high pass filter low pass filter b

A filter with a small bandwidth has a high value of Q a low value of Q a Q of zero a



A fully charged battery rated at 24 V, 60 Ah, is connected to a 48 watt light bulb. Approximately how long will the battery last?

30 hrs 120 hrs 2.5 hrs

a

A fully charged, 10 cell NiCad battery has a nominal voltage of

1.2 Volts 12 Volts 13.6 Volts b

A generator is labelled as having 115V/200V, 20A and PF 0.8. What is the apparent power in each line that the generator can produce?

2.3 kW 2.3 kVA 4 kVA

c

A generator rated at 30 KVA and power factor 08 has a maximum continuous power output of

30 kW 24 kW 37.5 kW b

A generator supplies 25 A, 4 V and 50 W. What is the apparent power and the power factor?

100 VA and 2 400 VA and 0.5 100 VA and 0.5 c

A good conductor has a large number of electrons

a large number of electrons in its outer orbit

a small number of electrons in its outer orbit

c

A high pass filter attenuates frequencies above a certain value below a certain value within a particular band b

A high pass filter has high impedance to low frequency, low impedance to high frequency

high impedance to high frequency, low impedance to low frequency

high impedance to both high and low frequency a

A lead acid battery comprises three cells connected in series, each cell of capacity 20Ah. If 4 such batteries were connected in parallel, what would be the specification of the resulting combination?

8 V and 60 Ah 2 V and 240 Ah 6 V and 80 Ah

c

A material with a narrow hysteresis loop has high retentivity has low retentivity cannot be magnetised b

A material's opposition to flow of current is termed its resistance reluctance conductance a

A molecule is the smallest part of a compound an electron an atom a

A neutron is a particle which is contained within the nucleus of most atoms

orbiting around the nucleus of the atom

contained in the nucleus of all atoms a



A parallel circuit with any number of 2 terminal connections has the same current throughout

the individual voltage drops is equal to the emf

the resistance is dependent on current b

A photovoltaic cell produces electricity when subjected to light heat pressure a

A piezo-electric device generates electricity through pressure friction light a

A pure capacitor, inductor and resistor are connected in series and the voltage drops across each are 10 V. The total current flowing in the circuit is 1 A. How much true power is the circuit consuming?

30 VA 30 W 10 W

c

A resistor is consuming 2 watts. How much power will be consumed if the applied voltage is doubled?


2 watts 8 watts

c

A short circuit between the supply and ground does not matter if the circuit uses the aircraft ground as a return

could be very dangerous as the current drawn will be very high

is not dangerous as the current drawn will be low b

A simple circuit has 4 amps flowing through a 5 ohm resistor. How much power is being used?

20 watts 100 watts 80 watts c

A sine wave has a frequency of 20 Hz. Its period is 0.05 seconds 20 cycles per minute 5 milliseconds a

A sine wave of RMS value 7.07 volts has a peak to peak value of

10 volts 0.707 volts 20 volts c

A single-phase circuit has an input voltage of 100 V. The current is 10 A and the circuit has a power factor of 0.5. The true power is

1000 W 50 W 500 W

c

A soft iron core is used in an electro-magnet because it has high permeability and high coercivity

high permeability and low coercivity

low permeability and high coercivity b

A step up transformer has one winding two windings three windings b

A transformer has 1200 turns primary and 4800 turns secondary. What value of load resistance would be required to give a reflected impedance of 1000 Ohm

1 kohm 4 kohm 16 kohm

c



A Transformer has 4500 secondary turns and 750 primary turns. Its turns ratio is

1:6 6:1 1/6 a

A transformer has 500 turns on the primary and 100 turns on the secondary and the secondary is connected to a 10 ohm load. When connected to a 100 V supply the primary current is

10 amps 0.4 amps 2 amps

b

A transformer has 500 turns on the primary and 100 turns on the secondary. When connected to a 100 V supply, the output is

500 V 20 V 25 V

b

A transformer has an input of 400V and a ratio of 2:1. If the transformer is delta/star wound, what will the line voltage output be?

115 V 200 V 346 V

c

A transformer is designed to operate at 60 Hz. It is connected across a 50 Hz supply. The primary windings would

draw more current draw less current draw the same current

a

A transformer rated at a frequency of 200 Hz may be used at any other frequency

may only be used at the rated frequency or above

may only be used at the rated frequency or below

b

A Transformer with 115 V primary voltage and a ratio of 5:1 is supplying a landing light (load 24v 45 amps). What is the current drawn?

205 amps 9 amps 4.5 amps

b

A transformer with a 5:1 ratio has a 24 V output. What is the input?

120 VDC 4.8 VAC 120 VAC c

A tuned circuit at resonance is inductive resistive capacitive b

A two-phase induction motor has 2 poles 3 poles 4 poles c

AC frequencies are expressed in degrees/second cycles per minute Hertz c

AC value that can produce the same heat as DC is called rms value average value peak value a

According to Faraday's Law, an EMF induced in a coil has the same polarity as the current producing it

has a magnitude proportional to the rate of change of flux

opposes the magnetic field producing it b



According to Lenz's Law, the polarity of the current induced in a coil

is the same as the polarity of the voltage producing it

increases the strength of the magnetic field producing it

opposes the magnetic field producing it b

According to Ohm's Law, the current in a DC circuit is proportional to both the voltage and the resistance

inversely proportional to the resistance and proportional to the voltage

inversely proportional to the voltage regardless of the resistance

b

Alternator output frequency is affected by number of pole pairs rotational speed of the driving motor

both statements are true c

An 80 watt light bulb is switched on for 4 hrs. How much energy is dissipated in total?

An AC circuit has a power factor of 0.8, and is drawing 10 A at 100 Volts. How many watts are being used?


An AC generator has an output of 200 KVA. The real load is 140 KW. The power factor is

1.43 0.3 0.7 c

An AC generator has four poles. To produce a frequency of 400Hz it must achieve a speed of

6,000 RPM 8,000 RPM 12,000 RPM c

An AC motor that rotates at the same speed as the supply frequency is called

a universal motor an induction motor a synchronous motor c

An AC signal has an amplitude of 100 volts. The RMS value would be

50 Volts 71 Volts 141 Volts b

An accumulation of hydrogen on the plates of a battery is known as

hydration polarization ionization b

An advantage of a star connected generator over a delta connected generator is

a balanced load is guaranteed

two voltages are available

the line and phase voltages are equal b

An alternator delivers 500V RMS at 1 ampere with at a power factor is 08. What is the true power?

100 VA 400 W 500 W b

An atom is the smallest part of an element that retains its characteristics

the smallest part of a compound that can exist independently

the smallest particle of matter

a

An electric current is an excess of free electrons

an excitement of electrons in a metal

an ordered flow of electrons c



An electric current is a flow of electrons from a positively charged area to a negatively charged area

protons from a positively charged area to a negatively charged area

electrons from a negatively charged area to a positively charged area

c

An electrical circuit contains 3 resistors of equal value connected in parallel. The total current in the circuit will be equal to

the current flowing through one resistor

three times the current in one resistor

one third the current in one resistor b

An element whose atoms have fewer than 4 electrons in their valency shell is

a good conductor a good insulator a semiconductor a

An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?

resistance and capacitive reactance

resistance and voltage inductance and frequency c

An induced current in a coil opposes the EMF producing it

aids the EMF producing it

does not affect the EMF producing it a

An inductor has 1,000 turns of wire and a cross sectional area of 0.001m. If the core has a permeability of 0.000001 and the coil is 0.1m, what is the value of the inductor?

10 mH 100 microH 100 mH

a

An LCR circuit supplied with 100 V draws 0.5 amps, and consumes 50 watts. The phase difference between the votage and current is

180 90 0

c

An oxygen molecule contains two oxygen atoms with shared electrons neutrons protons a

Apparent power in an AC circuit is found by V x I V x I x cos V x I x sin a

Apparent Power is measured in KW or Watts KVA or VA KVAR or VAR b

Applying friction to an insulating material alters the number of electrons in its atoms

has no effect on its atomic structure

alters the number of protons in its atoms a

Armature reaction is reactive sparking due to dirty or worn commutator

the MMF opposing rotation c

As a lead-acid cell discharges, its internal resistance decreases increases remains constant b

As the generator load is increased (within its rated capacity), the voltage will

remain constant and the amperage output will decrease

decrease and the amperage output will increase

remain constant and the amperage output will increase

c



Atoms contain molecules hydrogen electrons c

Commutator ripple can be reduced by using a ripple filter increasing the speed of rotation

connecting a resistor in series with the armature

a

Connecting batteries in parallel increases the capacity; the voltage remains the same

increases the voltage and capacity

increases the voltage; the capacity remains the same

a

Connecting batteries in series increases the capacity; voltage remains the same

increases the voltage and capacity

increases the voltage; the capacity remains the same

c

Copper losses in a transformer are caused by circulating currents through the transformer

the resistance in the windings

wasting of the copper wires due to friction b

Devices that generate electricity by immersing dissimilar metals in an electrolyte are

photo-voltaic cells voltaic cells thermo-electric cells b

Doubling the running time of an electrical machine would double the

joules used watts used current used a

Eddy currents in a transformer can be reduced by constructing the core with

special non-metallic material

a single, solid piece of soft iron

laminated formers c

Electric lines of force between two negatively-charged objects will

cross over each other

attract each other repel each other c

Electrical charges build up on aircraft in flight due to friction the conductive skin of the aircraft cutting the Earth's magnetic flux

chemical action between the aircraft skin and the moisture in the air

a

Electrical power is expressed in Watts Coulombs Volts a

Electricity conducts through solids only solids and liquids vacuum b

Electromotive force is measured in watts ohms volts c

Electrons from different atoms have no effect on each other

attract each other repel each other c

Ferro-magnetic materials have a high reluctance low resistance low reluctance c

Frequency (Hz) is the number of cycles per revolution minute second c



Generators are usually excited by a permanent magnet

externally excited self excited c

Heat is converted into electrical energy by solar cells friction thermocouples c

How are generators rated? impedance at rated voltage

amperes at rated voltage

watts at rated voltage c

How many amperes are there in 10,000 micro amps? 10 A 0.01 A 0.1 A b

How many millivolts are there in 3.25 volts? 0.325 3,250 325,000 b

How much power is dissipated when a current of 3A flows through a 500 ohm resistor?

1.5 kW 4.5 kW 15 W b

How much power is supplied by a 24V generator connected to two 12 ohm resistors in parallel?


Hydrogen atoms consist of two protons and one electron

two neutrons and two protons

one proton and one electron c

If 2 coulombs flowed through a circuit in 2 seconds, the circuit current would be

2 volts 2 amps 1 amp c

If a bar magnet is cut in half the magnet is destroyed

two bar magnets are formed

one bar magnet and one non-magnet is formed

b

If a constant current of 25 ma is flowing through a capacitor of 50 microfarads, how long will it take to charge to 100 V?

200 milliseconds 200 seconds 150 seconds

a

If a DC circuit with a total resistance of 2 Ohms has 12 volts DC applied the resulting current would be

24 A 0.167 A 6 A c

If a generator sparks, a possible reason is the brush springs are loose

the brushes have been placed around the magnetic coil

magnetic flux deflecting the EMF a

If a transformer winding has some of its turns shorted together

the input voltage will reduce

the transformer will get hot in normal operation

the output voltage will be high b

If a voltage of 10 V is applied to a resistance of 250 ohms, what current will flow?

25 amps 4 milliamps 40 milliamps c



If an AC sinewave has an RMS value of 5V its peak value is 14.14 V 6.37 V 7.07 V c

If an insulated conductor is placed near to a negatively charged rod, the nearest end of the conductor becomes

negatively charged positively charged no change will occur b

If electrons are added to an atom it becomes a positive ion a negative ion a neutral ion b

If energy is supplied to a circuit for 5hrs at 800 j/sec, the total energy consumed is

4 KW hrs 240 KW hrs 1.6 KW hrs a

If several resistors of different value are connected in parallel, the total resistance is

equal to the lowest value reistor

smaller than the lowest value resistor

greater than the lowest value resistor b

If the area and thickness of a capacitor's dielectric are both doubled, its capacitance will

double half remain the same c

If the core losses in a transformer at half load are 200 W, at full load they will be

200 W 100W 400W a

If the cross sectional area of a conductor is doubled, the maximum voltage it can carry will

half double remain the same c

If the cross-sectional area of a conductor is increased, its resistance will

remain the same decrease increase b

If the current flowing into a junction is 5 A, 3 A, 4 A and 10 A out, what is the 5th wire carrying?

2 A in 2 A out 5 A out b

If the current reaches a maximum through an inductor of 2A in 15 sec, what is the current after 3 sec?

1.26 A 0.63 A 1 A a

If the field strength of a generator is doubled, and the speed is doubled, the output EMF will

quadruple double stay the same a

If the North Pole of a magnet is brought nearer to the North Pole of another magnet

attraction between them will be increased

repulsion between them will be increased

repulsion between them will be reduced b

If the output frequency of a 4 pole generator is 400 Hz, it's speed is

12,000 RPM 6,000 RPM 3,000 RPM a

If the phase and line voltages from a 3-phase generator are equal, the generator is

delta connected star connected unbalanced a

If the phase voltage in a star connected generator is 115V what is he line voltage?

115 V 200 V 346 V b



If the resistance of a resistor which is in series with two other resistors is doubled

the current in that resistance is doubled

the current in that resistance is halved

the volts drop across that resistor increases c

If the resistance of an electrical circuit is increased the voltage will increase

the current will increase

the current will decrease c

If the speed of a generator is halved and the field strength is doubled, the output voltage will be

halved doubled unchanged c

If the temperature of a pure metal is reduced to absolute zero, its resistance will be

infinity practically zero unaffected b

If the voltage across a resistor is doubled the current is doubled

the resistance is halved

the current is halved a

If the voltage in a resistive circuit is doubled, the current is halved inverted doubled c

If there was a mainly inductive load on an AC generator, the voltage with respect to the current would

lead lag be in phase a

If two 12 Volt, 10 Ah batteries are connected in parallel, the resulting combination would be

24 volts; 20 Ah 12 volts; 10 Ah 12 volts; 20 Ah c

If two AC signals of equal amplitude and frequency are at different points in their cycle at any given moment, they are said to be

in anti-phase attenuated out of phase

c

Impedance is the combined effect of resistance and reactance

real and imaginary power

resistance and conductivity a

In a 2-phase generator, the windings are electrically ______ apart from each other.

45 90 180 b

In a 2-phase generator, what angles are the phases to each other?

90 180 0 a

In a 3 phase delta connected AC generator line voltage is greater than phase voltage

line current is equal to phase current

line voltage is equal to phase voltage c

In a 3-phase generator, what angle are the phases to each other?

180 120 0 b

In a 3-phase motor, if 1 phase is lost, the motor remains at the same speed

runs at 1 third speed runs at 2 thirds speed a



In a 4:1 step up transformer, what would give a reflected impedance of 1k Ohm?

1k Ohm 4k Ohm 16k Ohm c

In a balanced Wheatstone bridge, the current through the centre of the bridge is

zero maximum positive maximum negative a

In a circuit C = 25 microfarads and the current flow is 40 micro amps for 4 seconds. What is the voltage?

12.8 V 6.4 V 3.2 V b

In a circuit containing resistors in parallel, the voltage is the same in all parts of the circuit

the sum of the voltage drops equals applied voltage

resistance is determined by value of current flow

a

In a DC circuit, power = 100 watts and voltage = 50 volts. What is the resistance?

2 Ohm 25 Ohm 50 Ohm b

In a Delta wound system the line current is equal to phase current

root 3 x phase current less than the phase current b

In a delta-connected generator line current = phase current multiplied by root 3

line current = phase current divided by root 3

line current = phase current a

In a Le Clanche cell, the plates are made of mercury and lithium nickel and cadmium zinc and carbon c

In a parallel LCR circuit, if the capacitance is increased by 4 times, what happens to the impedance?

increases by 4 times decreases by 75% remains the same c

In a parallel RLC circuit, the value of the capacitor is quadrupled, then the value of the impedance would

reduce increased remain the same a

In a parallel tuned circuit, at frequencies below resonance, the

voltage and current are in phase

voltage leads the current

current leads the voltage b

In a purely resistive AC circuit, increasing the frequency will increase the resistance

decrease the resistance

not affect the resistance c

In a purely resistive AC circuit, the current vector is in-phase with the voltage vector

+90 out of phase with the voltage vector

-90 out of phase with the voltage vector a

In a resistive circuit, doubling the EMF will double the resistance halve the current double the current c

In a series LCR circuit at resonance, R = 100 ohm, L and C are each 10 ohm. The total impedance is

100 ohms 120 ohms zero a



In a series resistive circuit, the total current is the sum of the currents flowing through each resistor

the same as the currents flowing through each resistor

the sum of the current reciprocals b

In a series tuned circuit at resonance the current leads the voltage

the voltage leads the current

the current and voltage are in phase c

In a series tuned circuit, at frequencies above resonance, the current and voltage are in phase

voltage leads the current

current leads the voltage b

In a simple voltaic cell the collection of ions on the cathode causes

hydration sulphation polarisation b

In a simple voltaic cell, polarisation reduces output voltage because of the

transfer of material between the anode and the cathode

build up of hydrogen on the anode

build up of hydrogen on the cathode b

In a single-phase AC generator, frequency is determined by the generator speed controlling the current flow through the voltage field windings

the number of pairs of poles a

In a star wound primary transformer, how could you wind the secondary winding?

star only delta only either delta or star c

In a vector diagram showing the magnitude and direction of inductive reactance, capacitive reactance and resistance in an AC circuit

the inductive reactance would be in opposition to the capacitive reactance and resistance at 90 degrees

the inductive and capacitance reactance would be additive with the resistance subtractive

it is impossible to show values of this kind using vectors

a

In AC generators 0.637 of the peak voltage is the RMS average value form factor b

In an AC circuit containing resistance and inductance, the current leads voltage current lags voltage current and voltage

are in phase b

In an AC circuit, real current is 3 A and imaginary current is 4 A. The power factor is

0.75 1.33 0.6 a

In an AC circuit, the effective voltage is equal to the maximum instantaneous voltage

greater than the maximum instantaneous voltage

less than the maximum instantaneous voltage

c



In an AC circuit, what happens if frequency is reduced? capacitive elements may be damaged

inductive elements may be damaged

there will be no effect b

In an AC generator, the phase windings are usually mounted on the

stator rotor field electromagnet a

In an electrical circuit with 28 V, 7 A, and 4 ohms, the dissipated power is equal to

4 watts 196 watts

12.25 watts b

In an LCR circuit the reactive power is 6KVAr and the real power is 8KW. The power factor is

0.8 0.75 1.33 a

In order to produce an alternating voltage of 400 Hz the number of pole-pairs required in an AC generator running at 6,000 rpm is

4 8 12

a

In the discharged state, the electrolyte of a lead acid cell would be

a weak concentration of sulphuric acid in water

a weak concentration of hydrochloric acid in water

a weak concentration of nitric acid in water a

In their pure form, germanium and silicon are both insulators conductors semi-conductors a

In transformer operation, hysteresis losses are current overcoming coil resistance

induced current in the iron core

energy wasted in reversing core magnetization

c

Increasing the current being carried by the windings of an electromagnet will have an effect on the resulting flux density. It will

increase the flux density up to a certain limit because of saturation

Increase the flux density proportional to field current

have no influence on flux density unless the number of turns on the winding is changed

a

Increasing the operating temperature of conductors carrying electrical current causes

an increase in resistance and a decrease in current

a decrease in resistance and an increase in current

no effect on the resistance and current a

Interpole windings fitted to DC series-wound generators are in series with the field

in parallel with the load in series with the load c



Kirchhoff's Law states that the algebraic sum of all the voltages entering or leaving a series circuit of components will be equal to zero

the algebraic sum of all the currents entering or leaving a series of components will be equal to one

the inverse sum of all the voltages entering or leaving a series of components will be equal to one

a

kVAR is a unit which is used for reactive (or imaginary) power

real power total power a

Lines of magnetic flux pass from N to S E to W S to N a

Magneto motive force m.m.f. can be found by N/I I x N Blv b

Material with good electrical insulating properties has more protons than electrons

electrons tightly bound to their parent atoms

a large number of positive ions b

Materials used for shielding sensitive electronic circuits from magnetic fields should have

high retentivity high permeabilty high reluctance b

b2 module 3 test 4

Documents