A $12 ext{ pF}$ capacitor is connected to a $50 ext{ V}$ battery. How much electrostatic energy is

Question

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

Professor PC Thomas Classes · Answer

Energy stored $U = \frac{1}{2}CV^2 = \frac{1}{2} 	imes 12 	imes 10^{-12} 	imes (50)^2 = 6 	imes 10^{-12} 	imes 2500 = 15000 	imes 10^{-12} = 1.5 	imes 10^{-8}	ext{ J}$.