Question

The $e/m$ ratio of anode rays produced in the discharge tube, depends on the:

• A. Nature of the gas filled in the tube
• B. Nature of anode material
• C. Nature of cathode material
• D. All of these

Answer 1

The correct option is A Nature of the gas filled in the tube

Anode rays are produced by the ionisation of gas molecules that are filled in the tube. Therefore $e/m$ depends only on the gas filled in the tube. So option (a) is correct.