Question

Membrane walls of living cells have surprisingly large electric fields across them due to separation of ions. what is the voltage across an 9.67-nm-thick membrane if the electric field strength across it is 7.46 mv/m? you may assume a uniform e-field.

Answer 1

The electric field is E = 7.46 miliVolts/meter

If we multiply the electric field times the length of the membrane, we can find the voltage across it.

V = E*d

Where d = 9.67 E -9 m

V = 7.46 mV/m * 9.67 E -9 m = 7.213 E -11 V

The answer is 7.213 E -11 Volts