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Coefficient of coupling and mutual inductance from self-inductances

This type of question, asked 5 times: 9 May 2023 S2, 16 May 2023 S1, 9 May 2024 S2, 17 Apr 2026 S2, 19 May 2026 S2. All 5 questions below, oldest first.

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  1. Question 1

    9 May 2023 S2

    18
    Two coils of self-inductance 25 mH and 9 mH are placed close together such that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is

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  2. Question 2

    16 May 2023 S1

    26
    The mutual inductance of two coils is 45 mH. The self-inductance of the coils are L1=75L_1 = 75 mH and L2=48L_2 = 48 mH. The coefficient of coupling between the two coils is

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  3. Question 3

    9 May 2024 S2

    19
    The mutual inductance (M) of the two coils is 3 H. The self inductances of the coils are 4 H and 9 H respectively. The coefficient of coupling between the coils is

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  4. Question 4

    17 Apr 2026 S2

    135
    Two coils having self-inductance L1=75L_1 = 75 mH and L2=48L_2 = 48 mH are coupled with each other. If the mutual inductance of the coils is 37.2 mH, then coefficient of coupling will be

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  5. Question 5

    19 May 2026 S2

    134
    Two coils of self inductance, 22 mH and 88 mH are placed so closed together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is,

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