Physics

Problem

A solenoid of 2000 turns is

0.50\,\text{m}

long and has a radius of

1.5\,\text{cm}

. It carries a current of

2.0\,\text{A}

. Using

\mu_0=4\pi\times10^{-7}\,\text{H m}^{-1}

, the total magnetic energy stored within the solenoid is closest to a)

5.7\times10^{-2}\,\text{J}

1.4\times10^{-2}\,\text{J}

2.8\times10^{-3}\,\text{J}

2.8\times10^{-2}\,\text{J}