# Inductor and Capacitor MCQ’s

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

1. The symbol used for capacitance is _____________

a)

b)

c)

d)

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)

b)

d)

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 L^{2}I

d) ½ LI^{2}

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

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^{-5t}v. 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 5.3t^{2}+4.7t. Calculate the power.

a) 0

b) 1

c) 16.854t^{3}+22.41t^{2}+6.62t

d) 15.3t^{3}+27.8t^{2}+19

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