Question

Derive the expression for energy stored in a parallel plate capacitor on charging a parallel plate capacitor to a potential v

Answer 1

Derive an expression for the energy stored in a parallel plate ... The energy stored on a capacitor is based on the work done by the battery in the circuit. ... Hence, the work done to move a charge element dq from the negative plate to the positive plate is equal to V dq. The voltage is proportional to the amount of charge which is already present in the capacitor.