Writing Errands

An unusual message delivery system is pic- tured in the figure. A 32 cm length of con- ductor (that is free to move) is held in place between two thin conductors. All of the wires are in a magnetic field. When a 6.7 A current is directed as shown in the figure, the wire segment moves upward at a constant velocity. The acceleration of gravity is 9.8 m/s 2 . 0.32 m 6.7 A 6.7 A6.7 A Assuming the wire slides without friction on the two vertical conductors and has a mass of 26 g, find the magnitude of the minimum magnetic field that is required to move the wire. Answer in units of T.

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