PHYSICS 240 Midterm: PHYS 240 University of Michigan Winter 2006 f05 Exam 3 1 sol
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Instructions: fill in your name above, this will be a 1. 5 hour, closed book exam. You can write on both sides of the card if you like: you will be asked to show your university student id card when you turn in your exam. 0 = 8. 85 x 10-12 c2/nm2 k = 1/(4 0) qelectron=-1. 6 x 10-19 c qproton=1. 6 x 10-19 c melectron=9. 1 x 10-31 kg mproton=1. 67 x 10-27 kg. 1: a zero resistance rod slides to the right on zero resistance rails separated by 0. 3 m. the rails are connected by a 25 resistor. A constant magnetic field of 0. 05 t permeates the region, coming straight out of the page. Find the speed at which the bar must be moved to produce a current of 0. 01a in the resistor: 34 m/s, *17 m/s, 89 m/s, 50 m/s, 28 m/s. I = emf / r = blv / r v = ri / bl = 16. 7 m/s.
