MHT CET 2024 Physics question
A square loop ABCD is moving with constant velocity '' in a uniform magnetic field '' which is perpendicular to the plane of paper and directed outward. The resistance of coil is 'R', then the rate of production of heat energy in the loop is [L - length of side of loop]
Answer: (B)
Solution
The intended case is a loop in which one side of length cuts the field lines with speed , so the motional emf is . Current . Rate of heat production , option (B). Dimension check: this is , a
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