State lenz 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 ?
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Lenz's law states that the polarity of induced emf is such that it produces 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 magnetic Road held horizontally along east-west direction is allowed to fall freely under gravity i.e., fall from north to south the magnetic flux changes due to vertical component of Earth's magnetic field which keeps on changing and the emf is induced in it
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