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प्रश्न
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उत्तर
संबंधित प्रश्न
State three factors on which the rate of emission of electrons from a metal surface depends
Why do Free electrons not leave the metal surface on their own
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
Name the unit in which the work function of a metal is expressed.
How is a cathode ray beam affected while passing through an electric field?
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
What is meant by Radioactivity?
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.
State three ways of obtaining an electron-beam.
A radioctive sample decays `7/8` times its original quantity in 15 minutes. The half-life of the sample is ______.
