MHT CET 2023 Physics question
A coil having effective area 'A' is held with its plane normal to a 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: (D)
Solution
The plane of the coil is normal to the field, so the initial flux is . After the field falls to 25% of its value, . Change in flux: . By Faraday's
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