When electric fields are applied to the cathode rays, they are deflected upward. ... He showed that cathode rays were made up of particles and lighter than hydrogen. Initially he named them corpuscles and later electrons. Thus the cathode rays have both mass and charge.

What is mass of cathode ray?

Cathode rays are deflected by a magnetic field. The rays are deflected away from a negatively charged electrical field and toward a positively charge field. The charge/mass ratio for the electron is 1.8 × 10⁸ Coulombs/gram.

What are cathode rays made up of?

Conclusion - The cathode rays are made up of negatively charged particles known as electrons.