exam3-magnetism - Problems(1 pt each You can choose 4 out...

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Problems: (1 pt. each. You can choose 4 out of 5, or lowest score will be dropped if you complete all of them). USE SI UNITS TO EXPRESS YOUR RESULTS 1) Two protons (charge 1.6x10 -19 C) are at positions A and B, at a distance of d=10 -6 m, as depicted in the figure below. Their velocities are 800 m/s. Calculate: a) The magnitude of the magnetic field created by proton A at position B. b) The direction of the magnetic field at point B is (circle one) A. Into the page B. Out of the page C. None of these. c) Calculate the magnitude of the magnetic force on proton B. d) The direction of the force is (circle one) A. Toward proton A B. Away from proton A 2) A straight wire carries a current of I=50A. An electron (charge -1.6x10 -19 C) is at a distance of 5m from the wire, moving with a velocity of 10 6 m/s parallel to the wire, in the same direction as the current. a) Calculate the magnitude of the magnetic force on the electron. b) Is the direction of the force: (circle one) A. Parallel to the wire. B. Toward the wire. C. Away from the wire. D. None of these.
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