Question

A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor?

Answer 1

Given: The capacitance of the capacitor is 12 pF and the source voltage is 50 V.

The electrostatic energy stored in the capacitor is given as,

U E = 1 2 C V 2

Where, capacitance of the capacitor is C and potential difference across the capacitor is V.

By substituting the given values in the above equation, we get

U E = 1 2 ×12× 10 −12 × ( 50 ) 2 =1.5× 10 −8  J

Thus, the electrostatic energy stored in the capacitor is 1.5× 10 −8  J.