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प्रश्न
Unit of radioactivity is _______
पर्याय
roentgen
curie
becquerel
all the above
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उत्तर
All the above
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संबंधित प्रश्न
Write one use of cathode ray tube.
What do you mean by Atomic number
What are the types of emission?
Why are materials of low work function preferred as thermionic cathode materials?
In a cathode ray tube state the purpose of covering cathode by thorium and carbon.
In a cathode ray tube state the purpose of the fluorescent screen.
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.
From α, β and γ-rays, name the one which travels with the speed of light?
What is the value of the speed of gamma radiations in air or vacuum?
It is advised not to touch a radioactive substance by hand. Give reason.
