Solving a problem in physics section 5 paragraph 37 ele

37. Frame area S = 100 cm2 uniformly rotates at n = 5 c-1 with respect to an axis lying in the plane of the frame and perpendicular to the induction lines of the homogeneous magnetic field (B = 0,5 T). Determine the average value of the induced emf in the time during which the magnetic flux penetrating the frame changes from zero to a maximum value.