Two electrodes separated by a distance d are maintained at a constant potential difference, V . When an electron moves from one of the electrodes to the other, its gain in kinetic energy is E .
The distance between the two electrodes is increased to 2d .
When an electron moves from one of the electrodes to the other, what will its gain in kinetic energy be?
a. 4E
b. 2E
c. E
d. 2E