Question

A capacitor works in:
A) A.C. circuits only
B) D.C. circuits only
C) Both A.C. and D.C.
D) Neither A.C. nor in D.C. circuit.

Answer 1

Hint:Capacitors are used in various electronic devices in modern times and these electronic devices used to work on the AC current of sometimes of the DC current. Capacitor stores charge during the time of DC circuit and changes polarity at the time of the AC circuit.

Complete solution:
A capacitor is made up of two metallic plates with a dielectric material in between the plates. When you apply a voltage over the two plates, an electric field is created, a capacitor works by storing energy electrostatically in an electric field.
A capacitor is an electronic component that stores and releases electricity in a circuit. It also passes alternating current without passing direct current. A capacitor is an indispensable part of electronic equipment and is thus almost invariably used in an electronic circuit.
-Capacitance in DC Circuits:-When capacitors are connected across a direct current DC supply voltage they become charged to the value of the applied voltage, acting like temporary storage devices and maintain or hold this charge indefinitely as long as the supply voltage is present.

-Capacitance as AC circuits:- The capacitor is connected directly across the AC supply voltage. As the supply voltage increases and decreases, the capacitor charges and discharges with respect to this change. A current will flow through the circuit, first in one direction, then in the other. However, no current actually flows through the capacitor
Hence we can say that a capacitor works as a A.C. and D.C. both.

So option C is the correct answer.

Additional information:
Uses of capacitors:
-Energy storage
-Pulsed power and weapon
-Power conditioning
-Power factor correction
-Suppression and coupling

Note:Capacitors are widely used in our machineries and also ruin it.
Capacitors are major causes of failure in electronic systems. Capacitors fail for various reasons, such as wear out, aging, reverse polarity voltage causing damage, mechanical damage during assembly, dielectric failure, high temperature induced damage during soldering, operation, testing, etc.