MHT CET 2024 Physics question
A circular coil of resistance 'R', area 'A', number of turns 'N' is rotated about its vertical diameter with angular speed '' in a uniform magnetic field of magnitude 'B'. The average power dissipated in a complete cycle is
Answer: (A)
Solution
The emf induced in the rotating coil is , so the power dissipated at an instant is . Over a complete cycle the average of is , hence
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