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CALC The long, straight wire shown in Fig. P29.57a carries constant current I. A metal bar with length L is moving at constant velocity as shown in the figure. Point a is a distance d from the wire. (a) Calculate the emf induced in the bar. (b) Which point, a or b, is at higher potential? (c) If the bar is replaced by a rectangular wire loop of resistance R (Fig. P29.57b), what is the magnitude of the current induced in the loop?
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