# Problem: A 60-cm-long heating wire is connected to a 120 V outlet. If the wire dissipates 45 W, what are (a) the current in and (b) the resistance of the wire?

###### FREE Expert Solution

Electrical power,

$\overline{){\mathbit{P}}{\mathbf{=}}{\mathbit{V}}{\mathbit{I}}{\mathbf{=}}\frac{{\mathbf{V}}^{\mathbf{2}}}{\mathbf{R}}{\mathbf{=}}{{\mathbit{I}}}^{{\mathbf{2}}}{\mathbit{R}}}$

(a)

P = 45 W

V = 120 V

###### Problem Details

A 60-cm-long heating wire is connected to a 120 V outlet. If the wire dissipates 45 W, what are (a) the current in and (b) the resistance of the wire?