The capacity of a condenser is `4 xx 10^(6)` farad and its potential is `100` volts. The energy released on discharging it fully will be

Options

A. `0.02 J`
B. `0.04 J`
C. `0.025 J`
D. `0.05 J`

Answer

A

Explanation

`U = (1)/(2) CV^(2) = (1)/(2) xx 4 xx 10^(-6) xx (100)^(2) = 0.02 J`