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  4. A long wire is in north-south direction, it is dropped freely towards earth, then no potential difference is induced between its ends. This statement is:

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Q. A long wire is in north-south direction, it is dropped freely towards earth, then no potential difference is induced between its ends. This statement is:

Rajasthan PMTRajasthan PMT 1997

Solution:

If wire falls in the direction north-south, then its length is parallel to the horizontal component of earth magnetic field, so no e.m.f. is induced in the wire.