Question

1 A metallic rod falls under gravity in such a way that it's two ends points in the direction of east and west, then:
A) No e.m.f is induced at all
B) An e.m.f is induced in it as it cuts earth's magnetic field
C) Two e.m.f's of equal but opposite directions are generated giving no net e.m.f induced
D) Gravitational field opposes it's downward motion ​

Answer 1

Answer:

Option B is correct.

Explanation:

According to faraday's law induced emf is directly propotional to the rate of change of magnetic flux. As magnetic flux changes as rod cuts earth's magnetic field there for an emf is induced in the rod.