JEE Main 2016 Physics question
A conducting metal circular-wire-loop of radius is placed perpendicular to a magnetic field which varies with time as , where and are constants at time . If the resistance of the loop is , then the heat generated in the loop after a long time is
Answer: (2)
Solution
The flux through the loop is , so the induced emf is
ε = - = .
The instantaneous power dissipated is , and integrating over all time,
H = ^∞{
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