A circular coil having 200 turns, 2.5 × 10– 4 m2 area and carrying 100 μA current is placed in a uniform magnetic field of 1 T. Initially the magnetic dipole moment (M) was directed along B. Amount of work, required to rotate the coil through 90° from its initial orientation such that M becomes perpendicular to B, is _________ μJ.                                                                                                                                  JEE-2024

Solution:                
A circular coil having 200 turns, 2.5 × 10– 4 m2 area and carrying 100 μA current is placed in a uniform magnetic field of 1 T. Initially the magnetic dipole moment (M) was directed along B. Amount of work, required to rotate the coil through 90° from its initial orientation such that M becomes perpendicular to B, is _________ μJ. JEE-2024

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