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प्रश्न
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संबंधित प्रश्न
Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.
Why do Free electrons not leave the metal surface on their own
What is thermionic emission?
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.
Give a scientific explanation.
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.
State three safety precautions that you would take while handling the radioactive substances.
In a cathode ray tube state the purpose of the fluorescent screen.
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?
Complete the following radioactive reaction:
\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
