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Mutual inductance from the flux linked and the current

This type of question, asked 2 times: 26 Apr 2025 S1, 19 Apr 2026 S1. All 2 questions below, oldest first.

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  1. Question 1

    26 Apr 2025 S1

    8
    When magnetic flux changes from 6.5×10−2 Wb6.5 \times10^{- 2}\text{ }Wb to 11×10−2 Wb11 \times10^{- 2}\text{ }Wb and the change in current is 0.03 A , the coefficient of mutual inductance will be

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  2. Question 2

    19 Apr 2026 S1

    135
    Consider two coils in which a current in one coil carrying 66 A causes the change in the flux in the second coil 12×10−412 \times 10^{-4} weber/turn. The second coil has 20002000 turns. The mutual inductance between the coils is

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