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Emf in a horizontal wire falling through a horizontal magnetic field

This type of question, asked 2 times: 29 Jan 2024, 23 Jan 2026 S1. All 2 questions below, oldest first.

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  1. Question 1

    29 Jan 2024

    112
    A horizontal straight wire 5 m5\text{ }m long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field 0.60×10−4Wbm−20.60 \times10^{- 4}Wbm^{- 2}. The instantaneous value of emf induced in the wire when its velocity is 10 ms−110{\text{ }ms}^{- 1} is ______ ×10−3 V\times10^{- 3}\text{ }V.

  2. Question 2

    23 Jan 2026 S1

    16
    A 20 m long uniform copper wire held horizontally is allowed to fall under the gravity ( g=10 m/s2g = 10\text{ }m/s^{2} ) through a uniform horizontal magnetic field of 0.5 Gauss perpendicular to the length of the wire. The induced EMF across the wire after it travels a vertical distance of 200 m is ____\_\_\_\_ mV .

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