Solving a problem in physics section 17 paragraph 60 el

Solving a problem in physics section 17 paragraph 60 el

60. A square frame with sides of 1 m revolves in a uniform magnetic field with a frequency of 5 / s. The axis of rotation is perpendicular to the lines of the frame field induction. The magnetic field varies in T = 0,001cosπt. What induced emf appears in the frame after 10 seconds after the start of rotation, if initially normal to the plane of the frame and the vector B is the angle β= 0°?

Additional information:

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)