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Homework Help: A dust particle through an electric field

  1. Jan 26, 2014 #1
    1. The problem statement, all variables and given/known data
    A small piece of dust of mass m = 3.8 mu or micro g (micrograms) travels through an electric air cleaner in which the electric field is 526 N/C. The electric force on the dust particle is equal to the weight of the particle.

    (a) What is the charge on the dust particle?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jan 26, 2014 #2


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    Homework Helper

    Two things: 1) no. of sig figs you can give the result to and 2) lack of units. Other than that, looks right. Is there a question?
  4. Jan 26, 2014 #3
    Okay, thanks! I just wanted to make sure I was doing it correctly.
  5. Jan 26, 2014 #4

    Simon Bridge

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    Science Advisor
    Homework Helper

    What he said.
    Always, please, show your reasoning and working.
    Always ask a specific question so we don't have to guess what you want.

    Oh... welcome to PF BTW.
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