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Motional emf across a straight conductor moving through a field (B l v)

This type of question, asked 5 times: 11 May 2023 S1, 12 May 2024 S2, 13 May 2024 S2, 17 Apr 2026 S2, 20 Apr 2026 S2. All 5 questions below, oldest first.

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  1. Question 1

    11 May 2023 S1

    12
    A boat is moving due east in a region where the earth's magnetic field is 3.6×10−53.6 \times 10^{-5} N/Am due north and horizontal. The boat carries a vertical conducting rod 2 m long. If the speed of the boat is 2.00 m/s, the magnitude of the induced e.m.f. in the rod is

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  2. Question 2

    12 May 2024 S2

    46
    An aircraft of wing span 40 m flies horizontally in earth's magnetic field 5×10−55 \times 10^{-5} T at a speed of 500 m/s. The e.m.f. generated between the tips of the wings of the aircraft is

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  3. Question 3

    13 May 2024 S2

    46
    A conductor 10 cm long is moved with a speed 1 m/s1\ \text{m/s} perpendicular to a field of strength 1000 A/m1000\ \text{A/m}. The e.m.f. induced in the conductor is [Given: μ0=4π×10−7 Wb/Am\mu_0=4\pi\times10^{-7}\ \text{Wb/Am}]

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  4. Question 4

    17 Apr 2026 S2

    136
    A straight line conductor of length 0.4 m is moved with a speed of 7.0 ms−17.0\ \mathrm{ms^{-1}} perpendicular to magnetic field of intensity 0.8 Wb m−20.8\ \mathrm{Wb\,m^{-2}}. The induced e.m.f. across the conductor is

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  5. Question 5

    20 Apr 2026 S2

    136
    An aeroplane having a wing span of 30 m flies due north with the speed of 170 m/s. Magnetic field B=3.6×10−5B = 3.6 \times 10^{-5} T. The potential difference between the tips of the wings will be

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