Question

Which of the following statements is incorrect for anode rays?

• A. Anode rays travel in a straight line in the absence of electric and magnetic fields
• B. They travel from anode to cathode
• C. The e/m ratio of anode rays is constant
• D. They are produced by the ionization of the gas in the discharge tube

Answer 1

The correct option is C The e/m ratio of anode rays is constant

From the diagram provided, fluoroscence is obtained on the negative terminal (connected to negative side of battery) anode rays are being produced.
For different gases, (e/m) ratio for anode rays will be different since the charge of the anode ray depends on the type of gas taken.