Physics

Problem

A circular loop of radius

6.0\,\text{cm}

carries a current of

4.0\,\text{A}

. Using

\mu_0 = 4\pi\times10^{-7}\,\text{T}\cdot\text{m/A}

, determine the magnitude of the magnetic field at the center of the loop. a)

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

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

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

4.2\times10^{-4}\,\text{T}