# How much power is produced if a voltage of 8 V is applied to a circuit with a resistance of 2 Omega?

Jan 16, 2016

$P = {V}^{2} / R$

#### Explanation:

Ohm's Law states that V = IR, and P = VI.
So, $P = {I}^{2} \cdot R \cdot \mathmr{and} \cdot P = {V}^{2} / R$
Calculate the circuit current from the first equation, and then calculate the power from the second equation.
I = V/R ; P = V*V/R or $P = {V}^{2} / R$