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State Lenz's Law. A metallic rod held...

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.

Text Solution

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Lenz's law states that the direction of the induced `emf` and the direction of induced current are such that they oppose the cause which produces them.The rod held along east west direction will fall in a perpendicular magnetic field `B_(H)` present in `N-S` direction.Hence an `emf` will be induced in the rod following the relation for the motional `emf epsilon =B_(H)upsilon l`.
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