Question

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

Answer 1

`9\ W`

Explanation:

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

`P=VI=V(V/R)=V^2/R`

`=\frac{9^2}{9}`

`=9\ W`