Physics

Problem

25 \text{ cm}

long solenoid has radius

2 \text{ cm}

and

500

total number of turns. It carries a current of

15 \text{ A}

. If it is equivalent to a magnet of the same size and magnetization

\vec{M}

(magnetic moment/volume), then

|\vec{M}|

is: a.

30000\pi \text{ Am}^{-1}

3\pi \text{ Am}^{-1}

30000 \text{ Am}^{-1}

300 \text{ Am}^{-1}