Question

The maximum electrostatic energy stored in a capacitor at any instance is?

(a) CVm^2

(b) 1/2*CVm^2

(c) CVm

(d) CVm/2

The question was asked in a national level competition.

I'd like to ask this question from Oscillation of Energy at Resonance in portion Resonance in AC Circuits of Basic Electrical Engineering

Answer 1

Right answer is (b) 1/2*CVm^2

To explain I would say: The maximum electrostatic energy stored in a capacitor at any instance is 1/2*CVm^2, where C is the capacitance value and Vm is the peak voltage.