In the figure, a metal rod is forced to move with constant velocity along two pa

Question

In the figure, a metal rod is forced to move with constant velocity along two parallel metal rails, connected with a strip of metal at one end. A magnetic field of magnitude B=0.490 T points out of the page. (a) if the rails are separated by 35.3 cm and the speed of the rod is 45.7 cm/s, what is the magnitude of the emf generated in volts? (b) if the rod has a resistance of 20.6 ? and the rails and connector have negligible resistance, what is the current in amperes in the rod? (c) at what rate is energy being transferred to thermal energy?

I was unable to upload the picture, sorry.

Explanation / Answer

a) magnitude of the emf generated in volts = Blv = 0.49*0.353*0.457 =0.079 V

b) I = 0.079/20.6 =0.003837 ohm

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