Answer:
187.5 V and the direction is counter clockwise
Explanation:
N = 50 turns, A1 = 0.25 m^2, A2 = 0, dt = 0.1 s
dA = A2 - A1 = 0.25 m^2, B = 1.5 T
induces emf, e = rate of change of magnetic flux linked with the coil
e = N x d (B A) / dt
e = N x B x dA/dt
e = 50 x 1.5 x 0.25 / 0.1 = 187.5 V
According to the Lenz law the direction of induced emf is such that it always opposes the responsible reason due to which it is produced.
So, the direction of induced emf is counter clock wise.