Circuits and Circuit Theory Part 2
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Attempt Free Circuits and Circuit Theory Part 2 Here. Read The Important Electrical MCQ From Below.
1. The power is measured in terms of decibels in case of
(A) Electronic equipment
(B) Transformers
(C) Current transformers
(D) Auto transformers
Correct Answer
2. Wire-wound resistors are unsuitable for use at high frequencies because they
(A) Create more electrical noise
(B) Are likely to melt under excessive eddy current heat
(C) Consume more power
(D) Exhibit unwanted inductive and capacitive effects
Correct Answer
Circuits and Circuit Theory Part 2
3. The product of apparent power and cosine of the phase angle between circuit voltage and current is
(A) True power
(B) Reactive power
(C) Volt-amperes
(D) Instantaneous power
Correct Answer
4. In a series resonant circuit, the impedance of the circuit is
(A) Minimum
(B) Maximum
(C) Zero
(D) None of the above
Correct Answer
5. In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value
(A) Will change the maximum value of current at resonance
(B) Will change the resonance frequency
(C) Will change the impedance at resonance frequency
(D) Will increase the selectivity of the circuit
Correct Answer
Circuits and Circuit Theory Part 2
6. In a loss-free R-L-C circuit the transient current is
(A) Oscillating
(B) Square wave
(C) Sinusoidal
(D) Non-oscillating
Correct Answer
7. In a circuit containing R, L and C, power loss can take place in
(A) C only
(B) L only
(C) R only
(D) All above
Correct Answer
8. Time constant of a capacitive circuit
(A) Increases with the decrease of capacitance and decrease of resistance
(B) Increases with the decrease of capacitance and increase of resistance
(C) Increases with the increase of capacitance and decrease of resistance
(D) Increase with increase of capacitance and increase of resistance
Correct Answer
Circuits and Circuit Theory Part 2
9. The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of
(A) Iron loss in core
(B) Skin effect
(C) Increase in temperature
(D) Capacitive effect between adjacent coil turns
Correct Answer
10. Skin effect occurs when a conductor carries current at _________ frequencies.
(A) Very low
(B) Low
(C) Medium
(D) High
Correct Answer
Circuits and Circuit Theory Part 2
