Question

The fundamental particle(s) constituting the cathode rays is
(i) Proton
(ii) Electron
(iii) Neutron

• A. Only (i)
• B. Only (ii)
• C. (i) and (ii)
• D. (ii) and (iii)

Answer 1

The correct option is B Only (ii)

In the presence of an electrical or magnetic field, the behaviour of cathode rays is similar to that expected from negatively charged particles, suggesting that the cathode rays consist of negatively charged particles, called electrons.
Hence, the correct answer is option (b).