On the O-axis, a square wire frame with dimensions a×a is pivotally fixed on one side. A magnet rotates around the same axis with an angular velocity ω, which creates a radial magnetic field in the area where the frame is located. Determine the angular velocity of the frame if the resistance of the unit of its length is p, the moment of friction M, and the magnetic field induction at the free edge of the frame is B.
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