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प्रश्न
What do you mean by electron emission?
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उत्तर
Free electrons leave the metal surface only if sufficient energy is supplied to the metal. This emission of electrons from metal surface is called the electron emission.
संबंधित प्रश्न
State the energy conversion taking place in a cathode ray tube
Name the unit in which the work function of a metal is expressed.
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
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.
State any two uses of cathode rays.
Two radioactive nuclei are represented by xAp and yAq and when p and q are mass numbers and x, y are the atomic number. How can the products be represented, i .e., what are the new values of p, q. x and y after the emission of an α-particle and a β-particle from A and B respectively.
Which part of the atom undergoes a change in the process of radioactive decay?
Mention one important function of ear main parts:
State the principle on which the functioning of a nuclear reactor is based.
88Ra226 experiences three α - decay. Find the number of neutrons in the daughter element.
