How to determine the charge on electron?

The charge on the electron was determined by Millikan by his Oil Drop Experiment.

Explanation

The charge of the electron is equivalent to the magnitude of the elementary charge (e) but bearing a negative sign. Since the value of the elementary charge is roughly 1.602 x 10-¹⁹ coulombs (C), then the charge of the electron is -1.602 x 10^-19 C.

• The experiment with Millikan is important since it defined the charge on an electron.
• Millikan used a very basic, very simple system in which the behaviour of gravitational, electrical, and (air) drag forces was controlled.

Articles to refer

1. What Is The Charge On An Electron
2. Conservation Of Charge
3. Electrons And Photons