JEE Main 2022 Physics question
A coil is placed in time varying magnetic field. If the number of turns in the coil were to be halved and the radius of wire doubled, the electrical power dissipated due to the current induced in the coil would be: (Assume the coil to be short circuited.)
Answer: (4)
Solution
Halving the number of turns halves the wire length, and doubling the wire radius makes its cross-section 4 times, so the resistance becomes R/8. With the coil area
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