MHT CET 2023 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 by 25% of its initial value in 2 second. Then the e.m.f. induced across the coil will be
Answer: (D)
Solution
Induced emf magnitude (plane normal to the field, so ). Reading the data as "reduced to 25% of the initial value": , so . Then \dfrac{A×\frac{3B}{4}}{2}$ =
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