The value of radius r moves towards a loop in angular velocity such that by plane the longest parallel, what is the distance between the roots and induced emf include a is maximum?

a) The distance is r² and the induced emf is maximum.
b) The distance is (r/2) and the induced emf is maximum.
c) The distance is 2r and the induced emf is maximum.
d) The distance is r and the induced emf is maximum.