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A horizontal wire is hung from the ceiling of a room by two mass less strings. The wire has a length of 0.20 m and a mass of 0.080 kg. A uniform magnetic field of magnitude 0.070 T is directed from the ceiling to the floor. When a current of I = 42 A exists in the wire, the wire swings upward and, at equilibrium, makes an angle ? with respect to the vertical. Find (a) the angle ? and (b) the tension in each of the two strings.

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