Question

What happens when the cathode rays are passed through an electric field between two parallel plates? Can one determine the nature of the charge of the particles constituting the cathode rays from this experiment? If Yes, how?

Answer 1

When the cathode rays are passed through an electric field, they are deflected towards the positively charged plate. This deflection of cathode rays towards the positively charged electrode indicated that the particles in the cathode rays are negatively charged particles.