Abstract
This experiment determines the charge of an electron by measuring the velocities of ionized oil drops in a gravitational and electric field. Through these measurements and an analysis of the forces at play, the charge of the oil drop can be calculated. While each oil drop may have a different number of excess electrons, they will all be integer multiples of the charge of a single electron. Therefore, we can take the greatest common multiple of all calculated charges to be the charge of a single electron.
