Inductor and Capacitor MCQ’s

Electric Circuits Electronics & Communication Engineering

This set of Electric Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Inductor and Capacitor”.

1. The symbol used for capacitance is _____________
a)

electric-circuits-questions-answers-inductor-capacitor-q1d

b)

electric-circuits-questions-answers-inductor-capacitor-q2

c)

electric-circuits-questions-answers-inductor-capacitor-q1c

d)

electric-circuits-questions-answers-inductor-capacitor-q1b

2. The formula used to find the capacitance C is __________
a) Q/v
b) Qv
c) Q-v
d) Q + v

3. The symbol used for inductance is __________
a)

electric-circuits-questions-answers-inductor-capacitor-q1

b)

electric-circuits-questions-answers-inductor-capacitor-q1b


c)

electric-circuits-questions-answers-inductor-capacitor-q1c


d)

electric-circuits-questions-answers-inductor-capacitor-q1d


4. The capacitor doesn’t allow sudden changes in ___________
a) Voltage
b) Current
c) Resistance
d) Capacitance

5. The expression for energy of an inductor ____________
a) ½ LI
b) L/2I
c) ½ L2I
d) ½ LI2

6. The voltage applied to a pure capacitor of 50*10-6 F is as shown in figure. Calculate the current for 0-1msec.

electric-circuits-questions-answers-inductor-capacitor-q8

a) 5A
b) 1A
c) -5A
d) -1A

7. The Inductor doesn’t allow sudden changes in ___________
a) Voltage
b) Current
c) Resistance
d) Inductance

8. The units for inductance is _________ and capacitance is ___________
a) Faraday, Henry
b) Coulomb, Faraday
c) Henry, Faraday
d) Henry, Coulomb

9. If a capacitor of capacitance 9.2F has a voltage of 22.5V across it. Calculate the energy of the capacitor.
a) 5062.5W
b) 506.25W
c) 50.625W
d) 50625W

10. A voltage across a capacitor of 0.5F is defined by
V (t) = [0, t<0
2t, 0<t<2s
4e-(t-2), t>2s] Find i (t).
a) -2e-(t-2) A
b) -4e-(t-2) A
c) -20e-(t-2) A
d) -12e-(t-2) A

11. An Inductor works as a ___________ circuit for DC supply.
a) Open
b) Short
c) Polar
d) Non-polar

12. The voltage applied to the 212mH inductor is given by v(t)= 15e-5tv. Calculate the current.
a) 16.782e-10t
b) 15.75e-5t
c) 11.27e-10t
d) 14.15e-5t

13. If the voltage across a capacitor is constant, then current passing through it is ________
a) 1
b) 0
c) -1
d) Infinity

14. The insulating medium between the two plates of capacitor is known as __________
a) Electrode
b) Capacitive medium
c) Conducting medium
d) Dielectric

15. If the current flowing through an inductor of inductance 0.3Henry is 5.3t2+4.7t. Calculate the power.
a) 0
b) 1
c) 16.854t3+22.41t2+6.62t
d) 15.3t3+27.8t2+19

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