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प्रश्न
What is meant by Radioactivity?
उत्तर
Process of spontaneous emission of α or β and γ radiations from the nuclei of atoms during their decay.
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संबंधित प्रश्न
State any two precautions to be taken while handling radioactive substances
Give one example of isobars.
When is said to be the nucleus unstable?
Define the term radioactivity. Of the three normally occurring radioactive radiations:
(a) Which has a positive charge?
(b) Which is most penetrating?
(c) Which has no electric charge?
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
During the emission of a beta particle, the ______ number remains same.
Define free electrons.
How is a cathode ray beam affected while passing through an electric field?
In a cathode ray tube state the purpose of the fluorescent screen.
Name the three main parts of a Cathode Ray Tube.
