Discussion Forum



1)

The magnetic dipole moment of a short magnetic dipole at a distant point along the equator of the magnet has a magnitude of 'X' in SI units. If  the distance between the point and the magnet  is halved then the magnitude of the dipole moment will be 


A) 2 X

B) $\frac{1}{2}X$

C) X

D) $\frac{1}{8}X$

Answer:

Option C

Explanation:

 The magnetic dipole moment is the product of either of pole strength and the magnetic length of dipole. Thus, it is independent of the distance of the point at which it is measured. So, it remains  unchanged, if the distance between point and the magnet is halved