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

Question

In the figure, a metal rod is forced to move with constant velocity v along two parallel metal rails, connected with a strip of metal at one end. A magnetic field of magnitude B - 0.350 T points out of the page. a) If the rails are separated by L-25 cm and the speed of the rod is 55 what emfis 3. generated? 2 points) b) If the rod has a resistance of 18 02 and the rails and connector have negligible resistance, what is the current in the rod? (2 points) c) At what rate is energy being transferred to thermal energy? (2 points)

Explanation / Answer

a) emf generated = BvL

emf generated = 0.350 * 0.55 * 0.25

emf generated = 0.0481 V

b) current in the rod = 0.0481/18

current in the rod = 2.67 *10-3 A

c)

energy transferred to thermal energy = V^2/R

energy transferred to thermal energy = 0.0481^2/18

energy transferred to thermal energy = 1.24 *10-4 W

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