In an electrical circuit, a battery is connected to pass 20 C of charge through it in a certain given time. The potential difference between two plates of the battery is maintained at 15 V. The workdone by the battery is ______ J

The work done by a battery is given by $$W = qV$$, where $$q$$ is the charge passed through the battery and $$V$$ is the potential difference maintained across its terminals.

Here, $$q = 20$$ C and $$V = 15$$ V. Therefore:

$$W = 20 \times 15 = 300$$ J

The work done by the battery is $$\mathbf{300}$$ J.