Question

If the stored energy is Q on charging a capacitor by charge Q. The stored energy on doubling the charge will be:
(a) 2 W
(b) 4 W
(c) 8 W
(d) \(\frac{1}{2}\) W

Answer 1

(b) 4 W
Energy stored in capacitor (U) = \(\frac{q^{2}}{2 C}\)