Question

A conducting loop of radius R is present in a uniform magnetic field B
perpendicular to the plane of the ring. If radius R varies as a function of
time 't' as R = Ro + t. The e.m.f induced in the loop is:-
B
SR
(1)
2TT(Ro + t)B clockwise
TI(Ro + t)B clockwise
(2)
(3)
2TT(Ro + t)B anticlockwise
(4)
zero​

Answer 1

Answer:

A conducting loop of radius R is present in a uniform magnetic field B perpendicular to the plane of the ring. If radius R varies as a function of time t, as R=R0+t. The emf induced in the loop is. Since area is increasing, induced emf is in anticlockwise sense to oppose the chang in flux.