A magnet of magnetic moment M is situated with its axis along the dire – McqOptions

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1.	A magnet of magnetic moment M is situated with its axis along the direction of a magnetic field of strength B. The work done in rotating it by an angle of 180o will be [MP PMT 1985; MP PET 1997]
A.	\[-MB\]
B.	\[+MB\]
C.	0
D.	\[+2MB\]
Answer» E.

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