Question

Which statement about cathode rays is correct?

• A. They travel in straight line towards cathode
• B. They produce fluorescent discharge through the walls of the tube
• C. They produce heating effect
• D. They can affect photographic plate

Answer 1

Answer: (B), (C), (D)

They can affect photographic plate

(a) Cathode rays are negatively charged rays, hence they travel in straight line towards anode and not cathode.
(b) They produce flourescent effect on the plate or on the walls of the tube on which they strike.
(c) They produce heating effect beacuse they posses high kinetic energy.
(d) They can affect photographic plate.