# Problem 1-3: Using Power and Conductance

Determine the resistance of the resistor, $I$ and $V$.

Solution

$R=\frac{1}{G}=2 \Omega,\, P=RI^2\rightarrow I=\sqrt{\frac{P}{R}}=\pm\sqrt{5} A$.

a) $I=+\sqrt{5} A\rightarrow V=RI=+2\sqrt{5}$.
b) $I=-\sqrt{5} A\rightarrow V=RI=-2\sqrt{5}$.