The magnetic field to a small magnetic dipole of magnetic moment M, at distance r from the centre on the equatorial line is given by (in M.K.S. system) [MP PMT/PET 1998]

\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{2M}{{{r}^{2}}}\]

\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{M}{{{r}^{2}}}\]

\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{M}{{{r}^{3}}}\]

\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{2M}{{{r}^{3}}}\]

The magnetic field to a small magnetic dipole of magnetic moment M,

1.	The magnetic field to a small magnetic dipole of magnetic moment M, at distance r from the centre on the equatorial line is given by (in M.K.S. system) [MP PMT/PET 1998]
A.	\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{M}{{{r}^{2}}}\]
B.	\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{M}{{{r}^{3}}}\]
C.	\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{2M}{{{r}^{2}}}\]
D.	\[\frac{{{\mu }_{0}}}{4\pi }\times \frac{2M}{{{r}^{3}}}\]
Answer» C. \[\frac{{{\mu }_{0}}}{4\pi }\times \frac{2M}{{{r}^{2}}}\]