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Field normal to a coil of area A is reduced to 25% of its value in a given time: induced emf

The same question, asked 2 times: 11 May 2024 S2*, 14 May 2024 S2. Every wording below, oldest first.

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  1. Question 1

    11 May 2024 S2

    19
    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

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  2. Question 2

    14 May 2024 S2

    44
    A coil having effective area AA is held with its plane normal to magnetic field BB. The magnetic induction is quickly reduced by 25% of its initial value in 2 seconds. Then the e.m.f. induced across the coil will be

    Tap an option to check your answer.