MHT CET 2022 Physics question
A coil having effective area 'A' is held with its plane normal to magnetic field of induction 'B'. The magnetic induction is quickly reduced to 25% of its initial value in 1 second. The e.m.f. induced in the coil (in volt) will be
Answer: (B)
Solution
The plane is normal to the field, so the flux is . The final induction is , so the change in induction is . Magnitude of induced emf \frac{Δφ}{Δ t}$ =
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