R.A Millikan measured the charge of an electron using a simple method known as Millikan’s oil drop experiment. This note provides us an information on Millikan’s oil drop experiment.
If an electric current flows through a gas, it is known as electrical conduction or discharge in the gas. This note provides us an information on discharge tube.
The ratio of charge to mass is called the specific charge. This note provides us an information on Thomson’s experiment to determine specific charge (e/m) of electrons.
The invisible rays, emerging normally from the cathode of a discharge tube, kept at a pressure of the 0.01 mm of Hg and under very high potential difference of the order of 10-15 KV, supplied from the induction coil, are called cathode rays.