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Positive and neutral spheres

  1. Feb 10, 2010 #1
    Sphere A corries a net positive charge, and sphere B is nuetral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. What would happen to the neutral sphere?
    I know it woul become a neg charged but i dont know what happens when its grounded...
  2. jcsd
  3. Feb 10, 2010 #2


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    Science Advisor

    I assume both spheres are conductors. Before grounding, sphere B is at a positive potential V_0 due to its proximity to the positive charge. When it is grounded, electrons flow onto the surface of B to reduce its potential to 0.
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