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The work done in turning a magnet of magnetic moment M by an angle of from the meridian is n times the coresponding work done to turn it through an angle of . Here n is
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Correct option is B
W1=MB(cos0o-cos90o)=MB(1-0)=MBW2=MB(cos0o-cos60o)=MB(1-12)=MB2∴W1=2W2⇒n=2
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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 will be
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