Chapter 18, Problem 28P

BIO Electric field in body cell The electric potential difference across the membrane of a body cell is $\text{+0}\text{.070 V}$

(higher on the outside than on the inside). The cell membrane is $\text{8}\text{.0 }\times {\text{ 10}}^{\text{-9}}$ m thick. Determine the magnitude and direction of the $\stackrel{\to }{E}$ field through the cell membrane. Describe any assumptions you made.