Physics

Problem

Two long, straight wires are separated by

12\,\text{cm}

and each carries current into the page. The current in wire A is

4.0\,\text{A}

and the current in wire B is

9.0\,\text{A}

. Along the line joining the wires, at what distance from wire A is the net magnetic field equal to zero? a)

10.8\,\text{cm}

8.3\,\text{cm}

3.7\,\text{cm}

9.6\,\text{cm}