quiz8

  1. A proton moves at a speed of 1.00E4m/s. A uniform magnetic field of strength B=0.001T is turned on with a direction that is 30 degrees to the velocity. The resulting motion is a helix. The radius of the helix is determined by considering only the portion of the velocity that is perpendicular to the magnetic field. The radius of the helix is:
    a) 2.85E-5m
    b) 20.9cm
    c) 2.61cm
    d) 10.45cm
    e) 5.23cm
    No answer given yet
  2. In question 1 above, what is the component of velocity of the proton that is parallel to the magnetic field?
    a) 1.00E4 m/s
    b) 5.00E3 m/s
    c) 8.66E3 m/s
    d) 0.00 m/s
    e) 5.77E3 m/s
    No answer given yet
  3. A wire lies on the y axis carrying a current of 5.00A in the positive direction. A second wire lies along the x axis and carries a current of 10.0A in the positive x direction. What is the magnetic field at the point (x=1.00m, y=1.00m)? Draw this so that you are looking down onto the xy plane.
    a) 3.00E-6 T, upward
    b) 3.00E-6 T, down
    c) 1.00E-6T, upward
    d) 1.00E-6T, down
    e) zero
    No answer given yet