A) \[\frac{1}{{{r}^{2}}}\]
B) \[\frac{1}{r}\]
C) r
D) \[{{r}^{2}}\]
Correct Answer: D
Solution :
Magnetic moment, \[M=NIA=NI\,\,\pi {{r}^{2}}\]i.e.. \[M\propto {{r}^{2}}\]
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