Question

Power

Answer 1

Solution:

General definition of power: it is time rate of doing work or delivering energy.

$Power=\frac{Work}{Time};$ - general formula of power. Unit of power Watt [W].

$P=\frac{W}{t};$

In the electricity,

$W=Uq;$ here $U$ - potential differance, q - amount of charge;

$P=\frac{Uq}{t}=UI=\frac{I^{2}}{R};$ here - $I$ current, $R$ - resistance.