A potential difference of 75 mV exists between theinner and outer surfaces of a cell membrane. The inner surface isnegative relative to the outer surface. How much work is requiredto eject a positive sodium ion (Na+) from the interior of the cell?
The potential difference between the accelerating plates of aTV set is about 30 kV. If the distancebetween the plates is 1.8 cm, find themagnitude of the uniform electric field in the region between the plates.