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Homework Help: Net Torque

  1. Sep 16, 2008 #1
    I have no clue where to start on this problem :yuck:

    A long, thin rod (length = 3.5 m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +10.0 µC point charge is fixed to one end of the rod, while a -10.0 µC point charge is fixed to the other end. Everywhere in the x, y plane there is a constant external electric field (magnitude = 6.00 103 N/C) that is perpendicular to the rod. With respect to the z axis, find the magnitude of the net torque applied to the rod.
  2. jcsd
  3. Sep 17, 2008 #2


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    Homework Helper

    Find the force on each end of the rod. What is the force of the electric field on a point charge given by?
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