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Electrical Circuits MCQ Question with Answer

Electrical Circuits MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 29
Which is considered as the effect of a dielectric material?

Increasing capacitance
Decreasing capacitance
Reducing the working voltage
Increasing the distance between the plates
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Question No : 30
The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfera the load voltage will be

60 V
15 V
20 V
30 V
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Question No : 31
If a capacitor is rated for 200V dca what is its effective ac working voltage?

50 V
100 V
200 V
400 V
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Question No : 32
If resonant frequency is 10 kHz and quality factor is 50a then

Bandwidth is 200 Hz
XL= is 50a000
R is 50
XC= is 50a000
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Question No : 33
Which statement is true?

A series resonant circuit is of high impedance
A parallel resonant circuit is of low impedance
A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency
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Question No : 34
What is considered as the most important value of a sine wave?

Effective value
Peak value
Average value
Instantaneous value
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Question No : 35
An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive reactance of 15 . If a current of 1 ampere is flowinga what is the applied voltage

320 V
32 V
220 V
22 V
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