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Homework Help: 2Energy Potential problems

  1. Feb 1, 2010 #1
    1a. The electric field within the membrane separating the inside and outside of a biological cell is approximately 8.1 {MV/m} and is essentially uniform.If the membrane is 13 nm thick, what is the potential difference across the membrane?
    Express your answer using two significant figures




    1b. Relevant equations

    V=E*R

    1c. The attempt at a solution
    (8.1MV/m)(13nm)=80mv


    2a.It takes 70 J to move a 10 mC charge from point A to point B.What's the potential difference Delta V {AB}?
    Express your answer using two significant figures.


    2b.k=e(delta V)

    2c.70/(10*10^-6)
     
  2. jcsd
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