MHT CET 2025 Physics question
A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle . The component of earth's magnetic field in the direction perpendicular to swing is B. Maximum e.m.f. induced across the pendulum is (g=acceleration due to gravity)
Answer: (B)
Solution
The e.m.f. is largest when the bob has maximum speed, at the lowest point. Energy conservation from the extreme position (angle from the vertical): , so . The wire of length rotates about the point of
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