Question

Observe the following statements about cathode rays and choose the incorrect one.

• A. Their characteristics depend on the nature of gas present in the cathode ray tube.
• B. They travel in a straight line inside the tube
• C. They cast a shadow of the metal cross placed in their path.
• D.
  They deflect towards the positive terminal in the electric field.
  

Answer 1

The correct option is A Their characteristics depend on the nature of gas present in the cathode ray tube.

Cathode rays are the beam of electrons observed in a vacuum tube.
1. These travel in a straight line.
2. As these are negatively charged, they deflect towards the positive terminal in the electric field.
3. Their characteristics do not depend on the nature of the gas present in the tube.