Advertisements
Advertisements
Question
Why is a cathode ray tube evacuated to a low pressure?
Advertisements
Solution
The cathode ray tube is evacuated to a low pressure to avoid collisions of electrons with air molecules.
APPEARS IN
RELATED QUESTIONS
What is meant by radioactivity?
Give the relative ionizing power of α, β and γ radiations.
A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y What will be the values of P and Q in terms of A and Z?
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
In a cathode ray tube state the purpose of covering cathode by thorium and carbon.
An electrons emitter must have how much work function and melting point.
It is advised not to touch a radioactive substance by hand. Give reason.
Mention one important function of ear main parts:
State the principle on which the functioning of a nuclear reactor is based.
A deuteron strikes 8O16 nucleus with subsequent emission of an alpha particle. Identify the nucleus so produced:
When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as:
