A capacitor uses an electric field to store potential electric energy which can be used as a power source when connected to a network.
What is a capacitor and how it works?
Unlike the battery, a capacitor is a circuit component that temporarily stores electrical energy by distributing charged particles on (generally two) plates to create a potential difference. A capacitor can take a shorter time than a battery to charge up and it can release all the energy very quickly.
What is the main function of a capacitor?
The primary use of a capacitor is to store electrostatic energy in an electric field and hence supply this energy whenever possible to the circuit.
How does a capacitor store energy?
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.
Thus, the electric field is the correct answer.
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