A planar loop of wire rotates in a uniform magnetic field. Initially at t = 0, the plane of the loop is perpendicular to the magnetic field. If it rotates with a period of 10 s about an axis in its plane, then the magnitude of induced emf will be maximum and minimum, respectively at
1
2.5 sec and 5 sec
2
5 sec and 7.5 sec
3
2.5 sec and 7.5 sec
4
5 sec and 10 sec