|Feb12-07, 09:04 PM||#1|
Potential difference and current
1. The problem statement, all variables and given/known data
A typical cell membrane is 8.0 nm thick and has an electrical resistivity of 1.3 10^7 m. If the potential difference between the inner and outer surfaces of a cell membrane is 75 mV, how much current flows through a square area of membrane 1.3 Ám on a side?
2. Relevant equations
I was thinking to use R=p(L/A) and then V=IR to solve for the current, but I wasn't sure what to use for numbers. I know that V=75 mV and p=1.3 x 10^7, but would L=1.3 micrometers and A=L x 8.0 nm ?
|Similar Threads for: Potential difference and current|
|[SOLVED] current and potential difference, simplifying circuit diagrams||Introductory Physics Homework||3|
|Current and Potential difference in a circuit||Introductory Physics Homework||13|
|What's the Current of the Potential Difference?||Introductory Physics Homework||2|
|Potential Difference, current, and resistance||Introductory Physics Homework||3|
|EMF, Voltage, Current, Potential Difference etc.||Introductory Physics Homework||6|