A magnet of magnetic moment M amd pole strenth m is divided in two equal parts, then magnetic moment of each part will be

Options

A. M
B. M/2
C. M/4
D. 2M

Answer

B

Explanation

If magnet is cut along the axis of magnet of length l, then new pole strength becomes half i.e.,`m'=(m)/(2)` and new length remains same

`:. ` New magnetic moment `M'=(m)/(2) xx l=(ml)/(2)=(M)/(2)`