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प्रश्न
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
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उत्तर
(i) Decrease work function.
(ii) Coating the cathode with a layer of alkaline earth metallic oxides (or) hydrides.
संबंधित प्रश्न
State the energy conversion taking place in a cathode ray tube
State the penetrating range of α, β and γ radiations.
What happens to the atomic number of element when (i) An α -particle, (ii) A β -particle 1 and (iii) γ-radiation is emitted?
Define the term radioactivity.
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?
Name two radioactive substances.
How is a cathode ray beam affected while passing through an electric field?
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
What is the value of the speed of gamma radiations in air or vacuum?
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
