Question

The motion of electrons in a CRT is due to:

• A. Charge density
• B. Coulomb Force
• C. Lorentz Force
• D. Electron Gun

Hint:

In this question we using formula The Lorentz force that is given by: \[ \vec{F} = q(\vec{E} + \vec{v} \times \vec{B}) \]

Answer 1

The Correct Option is C

In a Cathode Ray Tube (CRT), the motion of electrons is influenced by the Lorentz force. This force arises due to the interaction between the electric and magnetic fields acting on the moving electrons. The electron gun is responsible for emitting the electrons, but the Lorentz force governs the actual movement of the electrons within the CRT. The Lorentz force is given by: \[ \vec{F} = q(\vec{E} + \vec{v} \times \vec{B}) \] where \( q \) is the electron's charge, \( \vec{E} \) is the electric field, \( \vec{v} \) is the electron's velocity, and \( \vec{B} \) is the magnetic field. This interaction drives the electron's motion within the CRT.