In Fig. 20.2, the distance between the rails is L = 5.0 cm. The metal rod is sliding to the right at v = 16 cm/s and the magnetic field has magnitude B = 0.75 T. The rod and rails have negligible resistance compared with the resistor (R = 180 Ω). Find 

(a) The current in the rod, 

(b) The rate at which energy is dissipated in the resistor, and 

(c) The magnetic force on the rod.

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