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A conducting rod of mass M with negligible electrical resistance slides on a pair of frictionless,...

A conducting rod of mass M with negligible electrical resistance slides on a pair of frictionless, horizontal, parallel, conducting rails separated by a distance L. The two rods are connected by an electrical resistance of R. A uniform magnetic field B is directed vertically upward in the entire region.

  1. Looking from above, is the conventional current flowing cw or ccw?                                                                                                       (2 pt)
  2. Determine the current through the resistor.                                                                                          (4 pt)
  3. Find the force necessary to keep the rod moving at a constant speed.                                                                                             (2 pt)
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