Physics

Problem

A square loop of side length

0.20\,\text{m}

lies in a plane. The loop must produce a magnetic field of

1.0\times10^{-5}\,\text{T}

at its center. What current must flow in the loop? (Assume the permeability of free space has its standard value.) a)

7.1\,\text{A}

1.8\,\text{A}

3.5\,\text{A}

0.90\,\text{A}