Advertisements
Advertisements
Question
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
Solution
When an electric field is produced between the two plates, the electron beam on entering the space between the plates gets deflected towards the positive plate. Because the electric field is normal to the direction of motion of electrons, electrons of the beam follow a parabolic path.
APPEARS IN
RELATED QUESTIONS
In a cathode ray tube state:
(i) the purpose of covering cathode by thorium and carbon.
(ii) the purpose of the fluorescent screen.
(iii) how is it possible to increase the rate of emission of electrons.
What is meant by radioactivity?
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
What are the uses of radioactive isotopes in following?
(a) Medical field,
(b) Agriculture,
(c) Industries?
State three safety precautions that you would take while handling the radioactive substances.
Define free electrons.
What are ‘Becquerel rays’?
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z + 1}Y + ^0_{-1}β}\]
Explain, why radium paint, consisting of zinc sulphide and a trace of radium salt, glows in the dark?
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
