Physics

Problem

Two long, straight, parallel wires are

4.0\,\text{cm}

apart and carry currents of

8.0\,\text{A}

and

12\,\text{A}

in the same direction. What is the magnitude of the force per unit length exerted on either wire? a)

9.6\times10^{-4}\,\text{N}\!/\!\text{m}

1.2\times10^{-2}\,\text{N}\!/\!\text{m}

4.8\times10^{-4}\,\text{N}\!/\!\text{m}

4.8\times10^{-5}\,\text{N}\!/\!\text{m}