Answer to Question #304040 in Physics for fatima

Question

How much energy is stored in a 50pF capacitor when it is charged to a potential difference of 200V?

Answer 1

$$W=\frac{CV^2}{2}\\ =\rm\frac{50*10^{-12}\: F*(200\: V)^2}{2}=1.0*10^{-6}\: J=1.0\: \mu J$$