Electrical Engineering · Question Bank

1P AC Circuits

136 of 161 questions match · page 7 of 7. Answer in your head first, then check the solution.

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#121📘 EE Pocket Reviewer RojasEasy
What is the peak factor of a half-wave rectified ac wave?
A1.57
B1.11
C1.414
D2
#122📘 EE Pocket Reviewer RojasEasy
All of the following of power factor of a series RLC circuit are correct EXCEPT one. Which one?
ARatio of resistance and impedance
BRatio of watts and volt-amperes
CRatio of net reactance and impedance
DRatio of kilowatts and kilovolt-amperes
#123📘 EE Pocket Reviewer RojasEasy
How does the voltage in a pure capacitor related to its current when supplied with an ac source?
AThe voltage leads the current by 90°
BThe voltage lags the current by 90°
CThe voltage leads the current between 0° to 90°
DThe voltage lags the current between 0° to 90°
#124📘 EE Pocket Reviewer RojasEasy
What is the behavior of an RLC circuit if the frequency is less than the resonant frequency?
ASeries circuit is capacitive while parallel circuit is inductive
BSeries circuit is inductive while parallel circuit is capacitive
CBoth circuits are capacitive
DBoth circuits are inductive
#125📘 EE Pocket Reviewer RojasEasy
The value of the current in a series resonance circuit is affected by which of the following circuit parameters?
AResistance
BInductance
CCapacitance
DAll of these
#126📘 EE Pocket Reviewer RojasEasy
Which one is magnified in a series resonant circuit?
AVoltage
BCurrent
CImpedance
DAll of these
#127📘 EE Pocket Reviewer RojasEasy
What is the peak factor of a sine wave?
A1.11
B0.707
C1.414
D1.57
#128📘 EE Pocket Reviewer RojasEasy
Which of the following is true about the power drawn by a pure reactance?
AIt is a true power
BIt is a radiated power
CIt is an apparent power
DIt is an imaginary power
#129📘 EE Pocket Reviewer RojasEasy
How does the inductive reactance of a circuit related to the frequency of the source voltage?
ADirectly proportional to frequency
BInversely proportional to frequency
CDirectly proportional to the square of frequency
DInversely proportional to the square of frequency
#130📘 EE Pocket Reviewer RojasEasy
What are the currents flowing in L and C during parallel resonance?
AThey are both zero
BThey are equal in magnitudes and in-phase
CThey are equal in magnitudes and out of phase by 90°
DThey are equal in magnitudes and out of phase by 180°
#131📘 EE Pocket Reviewer RojasEasy
What is the circuit behavior of a series RLC circuit above the self resonant frequency?
AInductive
BCapacitive
CResistive
DEither A or B, depending on the value of R
#132📘 EE Pocket Reviewer RojasEasy
Power factor is defined as the ratio of which of the following?
AVolt-ampere to watt
BWatts to reactive volt-ampere
CVolt-ampere reactive to volt-ampere
DWatt to volt-ampere
#133📘 EE Pocket Reviewer RojasEasy
What is the real power drawn by a circuit if the current and voltage are out of phase by 90°?
AMaximum
BMinimum
CZero
DUnity
#134📘 EE Pocket Reviewer RojasEasy
The conductance and susceptance components in the admittance are what type of elements?
ASeries elements
BParallel elements
CEither series or parallel, depending on values
DSeries-parallel elements
#135📘 EE Pocket Reviewer RojasEasy
At series resonance what is the value of the voltage drop across L or C in relation to the supply voltage?
AIt is less than the supply voltage
BIt is equal to the supply voltage
CIt is more than the supply voltage
DIt is either less than or more than depending on the value of the resistance
#136📘 EE Pocket Reviewer RojasEasy
What is the usual power factor of the industrial loads?
AUnity pf
BLagging pf
CLeading pf
DZero pf

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