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A conducting bar of length l moves to the right on two frictionless rails as shown
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A conducting bar of length l moves to the right on two frictionless rails, as shown in the figure below. A uniform magnetic field directed into the page has a magnitude of 0.30 T. Assume l = 35 cm and R = 9.0 ohms. (a) At what constant speed should the bar move to produce an 8.5-mA current in the resistor? What is the direction of this induced current? (b) At what rate is energy delivered to the resistor? (c) Explain the origin of the energy being delivered to the resistor.
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