# Electrical Energy

### Electrical Energy

1. From the definition of potential difference, the electrical work done is given by the equation $W=QV$ Where
W = work
Q = charge
V = potential difference
1. Since the work done must be equal to the energy to do the work, therefore we can also say that, the electrical energy ( E ) is also given by the formula $E=QV$

Example
Given that the potential difference across a bulb is 240V and the current that flow through the bulb is 0.25A. Find the energy dissipated in the bulb in 30s.

$I= Q t$ hence
$Q=It$
$E=QV E=(It)V E=(0.25)(30)(240) E=1800J$