Advertisements
Advertisements
प्रश्न
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
उत्तर
(i) Decrease work function.
(ii) Coating the cathode with a layer of alkaline earth metallic oxides (or) hydrides.
APPEARS IN
संबंधित प्रश्न
What happens if the negative potential is changed on a grid?
What are isobars?
Define the term radioactivity. Of the three normally occurring radioactive radiations:
(a) Which has a positive charge?
(b) Which is most penetrating?
(c) Which has no electric charge?
Define bound electrons.
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
Name a common device where a hot cathode ray tube is used.
Which part of the atom undergoes a change in the process of radioactive decay?
Unit of radioactivity is _______
Heavy radioactive elements eventually turn into ______.
Two radioactive sources A and B of half lives of 1 hour and 2 hours, respectively, initially contain the same number of radioactive atoms. At the end of two hours, their rates of disintegration are in the ratio of ______.
