# A charge of 54 C passes through a circuit every 6 s. If the circuit can generate 18 W of power, what is the circuit's resistance?

$= \frac{2}{9} \Omega$
$I = \frac{q}{t} = \frac{54}{6} A = 9 A$
$R = \frac{P}{I} ^ 2 = \frac{18}{9} ^ 2 = \frac{2}{9} \Omega$