The frame with current shown in Fig. has dimensions l = 4.0 cm, b = 5.0 cm. Induction of a uniform magnetic field B = 0.20 T. When the frame is rotated so that the normal to it makes an angle a = 30° with the lines of magnetic induction, a moment of force M = 2 • 10-3 N • m acts on the frame from the side of the magnetic field. Determine the current strength in the frame.
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