Simple Model of Charges in a Conductor
Effect of Rubbing a Negatively Charged Ribbon
  • Note that the motion of the positive charges is not shown since it is quite small compared to the motion of the negative charges.
  • Note also that the charges are not drawn to scale. Negative charges are much smaller than positive charges.
  • Focus on what happens to the negative charges (the blue ones) as we move a negatively charged ribbon near our block and later, as we transfer more negative charges into the block. When the charged ribbon is away, the negative charges move at random. When the charged ribbon is near, the negative charges are repelled to the bottom of the block while still moving randomly. The added charges move randomly along with the original nones.
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Authored by Taha Mzoughi,
based on Wolfgang Christian's PhysLets and inspired by http://physics.bu.edu/~duffy/semester2/c01_charging.html. Part of the code was from Andrew Duffy's simulation.