Question

How much electrical potential energy is stored in a capacitor that has 4.0 x10^10 C of charge on each plate and a potential difference across the platesof 20.0 V?

Answer 1

The electric potential energy is given by:

`PE_e=(1)/(2)QV`

plugging the values given we have:

`\begin{gathered} PE_e=(1)/(2)(4*10^(-10))(20) \\ PE_e=4*10^(-9) \end{gathered}`

Therefore the answer is A.