The membrane surrounding a living cell consists of an inner and an outer wall th

Question

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. Assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 6.30 10-6 C/m2.
(a) What is the magnitude of the electric field within the cell membrane?
____N/C

(b) Find the magnitude of the electric force that would be exerted on a potassium ion (K+; charge = +e) placed inside the membrane.
______N

Explanation / Answer

= 6.3 * 10-6 C/m2

0 = 8.9* 10-12 C2/(N*m2)

a) E= /0 = 7.07865 * 105 N/C

b) F = eE = 1.13258427 * 10-13 N

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