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Homework Help: Eletric charge

  1. Apr 4, 2010 #1
    1. The problem statement, all variables and given/known data

    which quantity of excess electric charge could be found on an object

    1) 6.25 x 10 exponenet -19 c
    2) 4.80 x 10 exponent -19 c
    3) 6.25 elementary charges
    4) 1.60 elementary charges

    2. Relevant equations

    i know that 1.60 x 10 exponenet - 19 c is one element charge

    3. The attempt at a solution

    but i dont know how many charges are in a object
  2. jcsd
  3. Apr 4, 2010 #2


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    Homework Helper

    Can you find 2.5 elementary charges in an object?
  4. Apr 4, 2010 #3
    The simplest charge on an object is that which you stated [tex]1.6 \times 10^{-19}C[/tex], which is one electronic charge.

    An 'object' is far too vague, this doesn't give us any information on the type of object, whether it is charged/uncharged or +ve/-ve charge.

    Are you sure you aren't missing any of the question?
  5. Apr 4, 2010 #4
    is it right that 4.80 x 10 exponenet - 19 c work since it gives 3 elementary charge
  6. Apr 4, 2010 #5
    Bingo, as all the others are fractions of an elementary charge.

    Glad you weren't fooled by the 4th choice, I assume many people will be.
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