# How much power is produced if a voltage of 9 V is applied to a circuit with a resistance of 9 Omega?

$9 \setminus W$

#### Explanation:

The power $P$ produced is a circuit having electrical resistance $R = 9 \setminus \Omega$ when a voltage $9 \setminus V$ is applied is equal to rate of Joule's heating given as follows

$P = V I = V \left(\frac{V}{R}\right) = {V}^{2} / R$

$= \setminus \frac{{9}^{2}}{9}$

$= 9 \setminus W$