Three identical rings move with the same speed on a horizontal surface in a uniform horizontal magnetic field normal to the planes of the rings. The first (A) slips without rolling, the second (B) rolls without slipping, and the third rolls with slipping.
(a) The same emf is induced in all three rings.
(b) No emf is induced in any of the rings.
(c) In each ring all points are at the same potential.
(d) B develops the maximum induced emf, and A, the least.
