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Field at right angles to a 50-turn coil of area 100 cm^2: time to remove it for an average emf of 0.1 V

The same question, asked 3 times: 4 May 2023 S2*, 14 May 2024 S1*, 26 Apr 2025 S1. Every wording below, oldest first.

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  1. Question 1

    4 May 2023 S2

    25
    A magnetic field of 2×10−22\times10^{-2} T acts at right angles to a coil of area 100 cm2^2 with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in time t. The value of 't' is (in second)

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  2. Question 2

    14 May 2024 S1

    50
    A magnetic field of 2×10−22\times10^{-2} T acts at right angles to a coil of area 100 cm2100\,\text{cm}^2 with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in time 't'. The value of 't' is

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  3. Question 3

    26 Apr 2025 S1

    46
    A magnetic field 4×10−2 T4 \times10^{- 2}\text{ }T acts at right angles to a coil of area 100 cm2100{\text{ }cm}^{2} with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in time ' tt '. The value of ' tt ' is

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