A copper rod moves with a constant angular velocity ω, about a long straight wire carrying a current i. If the ends of the rod from the wire are at distances a and b, then the e.m.f. induced in the rod is
zero
Motional EMF -
- wherein
magnetic field
length
velocity of u perpendicular to uniform magnetic field.
The velocity of any element and field applied by current carrying wire are parallel. Hence Emf induced is Zero.
Option 1)
Option is incorrect
Option 2)
Option is incorrect
Option 3)
zero
Option is correct
Option 4)
Option is incorrect