First slide

Magnetic dipole in a uniform magnetic field

Question

A magnet of magnetic moment ‘M’ is rotated through 2 $π$ radians in a magnetic field of induction B. The work done is

Very Easy

A

MB
B

2MB
C

$2 π M B$
D

Zero

Solution

$W = M B (1 - Cos θ) = M B (1 - Cos 0^{0})$

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