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प्रश्न
An electrons emitter must have how much work function and melting point.
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उत्तर
An electron emitter must have low work function and high melting point.
संबंधित प्रश्न
Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.
Under which conditions does the nucleus of an atom tend to radioactive?
What happens if the negative potential is changed on a grid?
What are isobars?
Define the term radioactivity.
A radioactive substance is oxidized. What changes would you expect to take place in the nature of radioactivity? Explain your answer.
An element P disintegrates by α - -emission and the new element suffers two further disintegrations, both by β -emission, to form an element Q. Explain the fact that P and Q are the isotopes.
How is a cathode ray beam affected while passing through a magnetic field?
What is meant by Radioactivity?
State three common properties of beta rays and cathode rays.
