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Homework Help: Uniform Electric Fields

  1. Dec 1, 2008 #1
    1. The problem statement, all variables and given/known data
    A proton (m=1.67x10^-27) is suspended at rest in a uniform electric field E. Take into account gravity and determine E.


    2. Relevant equations
    FE=|q|E
    Fg=mg


    3. The attempt at a solution
    FG = mg
    FG = (1.67x10-27)(9.8)
    FG = 1.64 x 10-26

    Since the force on the proton due to the E field is equal and opposite, then:
    FE=|q|E
    FE / q= E
    (1.64x10-26) / (1.6x10-19) = E
    1.04x10-9 = E


    Is my work correct?
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 1, 2008 #2

    LowlyPion

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    Homework Helper

    Have you handled your exponents correctly?
     
  4. Dec 1, 2008 #3
    Probably not, but does the way I reached my answer make sense?
     
  5. Dec 2, 2008 #4

    Defennder

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    Homework Helper

    Yes the steps are correct, just a calculation error.
     
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