Question

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 ? Justify

Answer 1

Answer:

Lenz's law states that the polarity or 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 rod  held horizontally along east-west direction is allowed to fall under gravity then it fall from north to south, the magnetic flux changes due to vertical component of earth's magnetic filed. which keeps on changing and the emf is induced in it.