A) M
B) \[\frac{M}{2\pi }\]
C) \[\frac{M}{\pi }\]
D) \[\frac{2M}{\pi }\]
E) zero
Correct Answer: D
Solution :
Length of semicircle\[\pi r=l\] where \[r=\frac{l}{\pi }\] Distance between two poles in semicircle\[=2r\]. Magnetic moment\[M=m\times 2r=\frac{M}{l}\times \frac{2l}{\pi }=\frac{2M}{\pi }\]You need to login to perform this action.
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