Estimate the magnitude of the electric field in a cell membr

Estimate the magnitude of the electric field in a cell membrane with a thickness of 9 nm and membrane potential of 70 mV. Express your answer with the appropriate units. Please show your work!

Solution

The electric field is calculated as follows:

    E = V/d = 70x10^-3 /9x10^-9 m = 7.78x106 V/m = 0.778x10⁷ V/m = 0.8x10^7 V/m