State Lenz’s Law. A metallic rod held horizontally along east-west direction, is allowed to fall under gravity. Will there be an emf induced at its ends? Justify your answer.

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M.Sc. Biomedical Genetics, B.Sc. Biotechnology

Lenz’s law states that the polarity of induced emf is such that it tends to produce a current which opposes the change in magnetic flux that produces it. Yes, emf will be induced in the rod as there is change in magnetic flux. When a metallic rod held horizontally along east-west direction, is allowed...
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Lenz’s law states that the polarity of induced emf is such that it tends to produce a current which opposes the change in magnetic flux that produces it. Yes, emf will be induced in the rod as there is change in magnetic flux. When a metallic rod held horizontally along east-west direction, is allowed to fall freely under gravity i.e. fall from north to south , the intensity of magnetic lines of earth’s magnetic field changes through it i.e. the magnetic flux changes and hence the induced emf in it. read less
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B.Tech.

The vertical component of earth's magnetic field will be cut by the movement of the horizontal rod,so a motional emf will be generated across the ends of the rod.
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Bhatnagar Physics Excellency

yes, Because earth horizontal magentic field is from south to north, and because of gain in vel due to fall there will be induced emf vBl (vel * horizontal earth magnetic field * lenght of rod)
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