Electrical work is a physical quantity that is numerically equal to the product of the voltage applied to the ends of a conductor, the current flowing through it, and the time taken for the work to be done. It characterizes both the change in the amount of energy and the transformation of energy from one form to another:
$$A = IUt = I^{2}Rt = \frac{U^{2}}{R}t$$
where,
I— current;
R— resistance;
U— voltage;
t— time.
Electrical energy can be easily converted into other forms of energy, such as thermal energy, light energy, mechanical energy.