Power is defined as the ratio of the work done to the per unit of time. In mathematical terms, it can be represented as
[tex]\begin{gathered} P=\frac{W}{t} \\ =\frac{QV}{t} \end{gathered}[/tex]*Here W is the work done.
*Here Q is the charge.
*Here V is the potential difference.
*Here t is the time.
The power is defined as the product of the current and the voltage. It is given as
[tex]P=IV[/tex]*Here I is the current.
*Here V= IR is the voltage.
Substitute the known values in the above expression as
[tex]\begin{gathered} P=I\times(IR) \\ =I^2R \end{gathered}[/tex]