A) \[\frac{4\pi }{M}\]
B) \[\sqrt{\frac{4\pi M}{i}}\]
C) \[\sqrt{\frac{4\pi i}{M}}\]
D) \[\frac{M\pi }{i}\]
Correct Answer: B
Solution :
\[l=2\pi r\] or \[r=\frac{l}{2\pi }\] Area of circular loop \[A=\pi {{r}^{2}}\] Magnetic moment \[M=iA=i\pi {{r}^{2}}\] \[M=i\pi \times {{l}^{2}}/4{{\pi }^{2}}\] or \[l=\sqrt{\frac{4\pi M}{i}}\]You need to login to perform this action.
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