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As shown in Fig. 32-5, a metal rod makes contact with a partial circuit and completes the circuit. The circuit is perpendicular to a magnetic field with B = 0.15 T. If the resistance is 3.0 S, how large a force is needed to move the rod as indicated with a constant speed of 2.0 m/s? At what rate is energy dissipated in the resistor? |
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