1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Electrical Energy Problem

  1. Jul 12, 2004 #1
    If someone could help me start this problem, it would be greatly appreciated.

    Charges of equal magnitude 1.00X10^-15 C and opposite sign are distributed over the inner and outer surfaces of the cell wall. Find the force on the potassium ion (K+) if the ion is, (a) 2.70 micro-meters from the center of the cell, (b) 2.92 micro-meters from the center, and (c) 4.00 micro-meters from the center.

    I suspect that I'm going to use F=qE but I'm not quite sure.
    Last edited: Jul 12, 2004
  2. jcsd
  3. Jul 14, 2004 #2
    What size are the inner and outter surfaces of the cell wall? Are the charges distributed uniformly?

    I guess that you have to calculate the electric field, but the electric field depends on the cell wall.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook