PHY 2049 Midterm: University of Florida PHY 2049 exam3_solutions
Document Summary
March 20, 2002: suppose the rod in the gure is moving at a speed of 5. 0 m/s in a direction perpendicular to a 0. 80-t magnetic eld. The rod has a length of 1. 6 m and has negligible electrical resistance. The rails also have negligible resistance, and the light bulb has a resistance of 96 . Find the induced current in the circuit. (1) 0. 067 a (2) 26 a (3) 614 a (4) 0. 43 a (5) 6. 4 a. The area enclosed by the loop is l x, where l is the length of the rod, and x is the distance from the left side. E = and = b(area) = blx to get: d dt. E = d dt (blx) = bl dx dt. Therefore, e = ir = blv, and we get i = = 0. 067a: a source injects an electron of speed v = 2 102 m/s into a region with a uniform magnetic eld of magnitude.
