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Homework Help: Help finding the voltage in a uniform E-field

  1. Jul 2, 2014 #1
    1. The problem statement, all variables and given/known data
    Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. What is the voltage across an 8.67-nm-thick membrane if the electric field strength across it is 9.16 MV/m? You may assume a uniform E-field.

    2. Relevant equations


    3. The attempt at a solution

    .00912V/m=-V/(8.67e-9m) =7.9e-11 V
  2. jcsd
  3. Jul 2, 2014 #2

    sorry i ment that for my answer i got -9.24e6 V/m. i was looking at the wrong thing.
  4. Jul 2, 2014 #3


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    Gold Member

    Didn't you just post this exact same question?
  5. Jul 2, 2014 #4


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