1.

An iron rod of length L and magnetic moment M is bent in the form of a semicircle. Now its magnetic moment will be             [CPMT 1984; MP Board 1986; NCERT 1975; MP PET/PMT 1988; EAMCET (Med.) 1995; Manipal MEE 1995;RPMT 1996; BHU 1995; MP PET 2002]

A.            \[M\]                                      
B.            \[\frac{2M}{\pi }\]
C.            \[\frac{M}{\pi }\]               
D.            \[M\pi \]
Answer» C.            \[\frac{M}{\pi }\]               


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