Work Done by Magnetic Torque
A magnetic dipole with moment μ = 3.0 × 10^-2 A·m² is initially at an angle of 60° with a uniform magnetic field of 0.25 T. If released, the dipole rotates to its equilibrium position. What is the work done by the magnetic torque during this rotation?
A
3.75 × 10^-3 J
B
7.5 × 10^-3 J
C
-3.75 × 10^-3 J
D
0 J
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