In the oil drop experiment, Millikan determined the?

In the oil drop experiment, Millikan determined the charge of the electron. Millikan's experiment involved suspending tiny oil droplets in a chamber and applying an electric field to them. By measuring the electric field needed to suspend the droplets and then carefully adjusting the electric field to make the droplets fall at a constant rate, Millikan was able to determine the charge on the oil droplets. By analyzing the charges on different droplets, Millikan found that the charges were all multiples of a fundamental unit of charge, which he concluded was the charge of a single electron. Therefore, Millikan's experiment helped to determine the value of the charge on a single electron.