GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following refers to the function of a capacitor?
A
It dissipates voltage across the circuit.
B
It absorbs and stores electrical charge.
C
It acts as the main source of electric potential.
D
It allows DC signals to pass through.
Explanation: 

Detailed explanation-1: -The ability of a capacitor to store energy in the form of an electric field (and consequently to oppose changes in voltage) is called capacitance.

Detailed explanation-2: -A capacitor is a device that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance.

Detailed explanation-3: -Capacitors are widely used in electronic circuits for blocking direct current while allowing alternating current to pass. In analog filter networks, they smooth the output of power supplies. In resonant circuits they tune radios to particular frequencies.

Detailed explanation-4: -between the capacitor plates. A charged capacitor stores energy in the electrical field between its plates. As the capacitor is being charged, the electrical field builds up. When a charged capacitor is disconnected from a battery, its energy remains in the field in the space between its plates.

Detailed explanation-5: -Capacitors are devices which store electrical energy in the form of electrical charge accumulated on their plates. When a capacitor is connected to a power source, it accumulates energy which can be released when the capacitor is disconnected from the charging source, and in this respect they are similar to batteries.

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