Question

A magnetic field is applied at perpendicular to the axis of cylinderical discharge tube then cathode and positive rays deflected in

• A. same direction
• B. opposite direction
• C. Mutually perpendicular direction
• D. No deflection for both

Answer 1

Answer: (A)

same direction

$\text{Solution}:$

1. The rays in a cathode ray tube are streams of electrons.

2.Electrons are negatively charged, and a magnetic field exerts forces on electrically charged particles that are in motion in a direction other than that of the magnetic field.

3. When a magnetic field is applied over the discharge tube, the cathode rays gets deflected towards the positively charged plate. This deviation is because of the fact that cathode rays are negatively charged.

$\text{Hence A is the correct option}$