A) \[\frac{3}{\pi }M\]
B) \[\frac{2}{\pi }M\]
C) \[\frac{M}{2}\]
D) M
Correct Answer: A
Solution :
[a] Magnetic dipole moment \[M=m\times \ell \] \[M'=m\times r\] From figure \[\ell =\frac{\pi r}{3}\] or \[r=\frac{3\ell }{\pi }\] so, \[M'=m\times r\] \[=\frac{m\times 3\ell }{\pi }=\frac{3}{\pi }M\]You need to login to perform this action.
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