Chapter 4, Problem 99A

Interpretation Introduction

Interpretation:

The reason for cathode ray tube being deflected by electric fields is to be explained.

Concept introduction:

The cathode ray tube is a vacuum tube in nature. But in the electric field when the particle emitted from a cathode ray tube, it is deflected by opposite charge attraction.

Answer to Problem 99A

The path of the electron beam is show parabola in the electrical field.

Explanation of Solution

The electronic beam goes in a straight-line path in a cathode ray vacuum tube, but it gets deviated from its path when an electric field is applied. The electronic beam is negative and in the electric field it is attracted to the opposite charge pole and shows a parabolic curve like path because there is an opposite charge interaction between the emitted particle in a cathode ray tube and electric field pole applied from outside.

Conclusion

The flow of electron is at a very high speed. Due to this, the beam gets deviated and shows a highly curved angle that shows a parabola.