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Homework Help: What would the final charge on the rod be?

  1. Sep 9, 2015 #1
    I had a question.

    If a glass rod, with a charge of 5.4x108 C touched another insulator so that all of the excess electrons are shared equally. What would the final charge on the rod be?

    I don't understand how to reach the answer of 2.7 x108 C.

    Thanks in advance. :)
     
  2. jcsd
  3. Sep 9, 2015 #2

    Bystander

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    How many objects are sharing the total charge?
     
  4. Sep 9, 2015 #3
    2 objects. The glass rod and the insulator.
     
  5. Sep 9, 2015 #4

    Bystander

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    Have you run into any conservation law regarding charge?
     
  6. Sep 9, 2015 #5
    The way I got the answer just now is by making each rod have half the excess electrons. So dividing 5.4 by 2 to = 2.7 x 10^8 C final charge.
    I got the answer but i dont know why i am right.
     
  7. Sep 9, 2015 #6

    Bystander

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    Charge is a conserved quantity, one of seven such.
     
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