A horizontal wire is hung from the ceiling of a room by two massless strings. The wire has a length of 0.19 m and a mass of 0.005 kg. A uniform magnetic field of magnitude 0.080 T is directed from the ceiling to the floor. When a current of I = 39 A exists in the wire, the wire swings upward and, at equilibrium, makes an angle ϕ with respect to the vertical, as the drawing shows. Find (a) the angle and (b) the tension in each of the two strings. (a) ϕ = (b) T =
