Chapter 18, Problem 41P

BIO Body cell membrane electric field (a) Determine the average magnitude of the $\stackrel{\to }{E}$ field across a body cell membrane. A 0.07-V potential difference exists from one side to the other and the membrane is $\text{7}\text{.5 }\times {\text{ 10}}^{\text{-9}}$ m thick. (b) Determine the magnitude of the electrical force on a sodium ion $\text{(charge +}e\text{)}$ in the membrane Assume that the dielectric constant is 1.0 (it is actually somewhat larger).