Chapter 29, Problem 29.25E

In Fig. E29.25 a conducting rod of length L = 30.0 cm moves in a magnetic field $\stackrel{\to }{B}$ of magnitude 0.450 T directed into the plane of the figure. The rod moves with speed υ = 5.00 m/s in the direction shown.(a) What is the potential difference between the ends of the rod? (b) Which point, a or b, is at higher potential? (c) When the charges in the rod are in equilibrium, what are the magnitude and direction of the electric field within the rod? (d) When the charges in the rod are in equilibrium, which point, a or b, has an excess of positive charge? (e) What is the potential difference across the rod if it moves (i) parallel to ab and (ii) directly out of the page?

Figure E29.25