1.

When a capacitor is charged by a battery, is the energy stored in the capacitor the same as the energy supplied by the battery? Why?

Answer»

Yes. To charge a capacitor, an external agent (the battery) has to do work against the electrostatic force due to the charges already present on the plates of the capacitor. This work done is stored in the form of potential energy in the electric field in the medium between the plates of the capacitor.



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