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Peak emf in a transformer secondary for a peak current of 2/pi A, M = 1 H, 50 Hz

The same question, asked 3 times: 15 May 2023 S1, 11 Apr 2026 S2, 16 Apr 2026 S2. Every wording below, oldest first.

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  1. Question 1

    15 May 2023 S1

    44
    Alternating current of peak value 2π\frac{2}{\pi} A flows through the primary coil of a transformer. The coefficient of mutual inductance between primary and secondary coils is 1 H. The peak e.m.f. induced in secondary coil (Frequency of a.c. =50= 50 Hz)

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  2. Question 2

    11 Apr 2026 S2

    139
    Alternating current of peak value (2π)\left(\dfrac{2}{\pi}\right) A flows through the primary coil of a transformer. The coefficient of mutual inductance between primary and secondary coils is 11 H. The peak em.f. induced in secondary coil is (Frequency of a. c. is 5050 Hz)

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  3. Question 3

    16 Apr 2026 S2

    137
    Alternating current of peak value (2π)\left(\dfrac{2}{\pi}\right) A flows through the primary coil of a transformer. The coefficient of mutual inductance between primary and secondary coils is 1H. The peak value of induced e.m.f. in the secondary coil is (Frequency of a.c. = 50 Hz)

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