A circular frame of radius 10 cm and 100 loops free to rotate around a vertical axis lying in its place,it is placed in a uniform magnetic field of induction 4*10^-3. The direct of the magnetic induction vector coincides with the positive direction of the normal to the plane of the frame.
• calculate the magnetic flux traversing the frame
• find the change in in flux corresponding to a rotation 30deg of the frame around its axis
• knowing that rotation takes 10ms, find the average rate of change of flux
• what does the average rate of change of flux correspond to?

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