Question

A parallel-plate capacitor has plates with an area of 430 cm2 and an air-filled gap between the plates that is 2.50 mm thick. The capacitor is charged by a battery to 600 V and then is disconnected from the battery.

a.) How much energy is stored in the capacitor?

b.) The separation between the plates is now increased to 4.50 mm . How much energy is stored in the capacitor now?

c.) How much work is required to increase the separation of the plates from 2.50 mm to 4.50 mm ?

Answer 1