Three indential rings move with same speed on a horizontal magnetic field normal to plane of rings. The first (a) slips without rolling, the second(b) rolls without slipping and the third rolls with slipping:

Options

A. The same e.m.f. is induced in all three rings.
B. no e.m.f. is induced in any of the rings.
C. in each ring all points are at same potential
D. `B` develops max, induced e.m.f. and `A`, the least.

Answer

A

Explanation

The induced e.m.f. is setup in a ring due to linear motion and does not depend upon the spin.