Cathode rays are produced when the pressure i | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Cathode rays are produced in a discharge tube at low pressure. The typical pressure required for the production of cathode rays is approximately $

Vedclass · Accepted Answer

$0.01 \ mm$ of $Hg$

Vedclass · Answer

(C) Cathode rays are produced in a discharge tube at low pressure. The typical pressure required for the production of cathode rays is approximately $0.01 \ mm$ of $Hg$ (or $10^{-2} \ mm$ of $Hg$).At this low pressure,the mean free path of the electrons becomes large enough to allow them to accelerate towards the anode without frequent collisions with gas molecules.If the pressure is higher,the number of gas atoms increases,leading to more frequent collisions between electrons and gas atoms,which obstructs the flow of electrons and prevents the formation of a stable cathode ray beam.

Cathode rays are produced when the pressure is of the order of

Similar Questions

In the phenomenon of electric discharge through gases at low pressure,the coloured glow in the tube appears as a result of
[$AIPMT$ $2008$]

Which of the following is not true with respect to cathode rays?

Cathode rays are

The metal which has the highest work function among the following is:

Positive rays consist of

Vedclass Test Series

Exam Paper Generator

Online Exam Module