Calculate the pole strength

cbse
magnetism

#1

A bar magnet of magnetic moment 5 A-${{m}^{2}}$ has poles 0.20 m apart. Calculate the pole strength.


#2

Here, M = 5 A-${{m}^{2}}$,
2l = 0.20 m and m = ?
As, M = m x 2l
m = M / 2l = 5/0.2 = 25 A-m