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Q1. A single bead can slide with negligible friction on the stiff wire that has been bent into a circular loop of radius 12.4 cm, as in the figure below. The circle is always in a vertical plane and rotates gradually about its vertical diameter with a period of 0.445 s. The position of the bead is described by the angle θ that the radial line, from the center of the loop to bead, makes with the vertical.

Q2. The triangular loop of wire in the drawing carries a current of I= 6.91 A. A uniform magnetic field is directed parallel to the side AB of the triangle and has a magnitude of 2.77 T.

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