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प्रश्न
Unit of radioactivity is _______
विकल्प
roentgen
curie
becquerel
all the above
उत्तर
All the above
APPEARS IN
संबंधित प्रश्न
State any two precautions to be taken while handling radioactive substances
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.
1) Name the radiation B which is unaffected by the electrostatic field.
2) Why does the radiation C deflect more than A?
3) Which among the three causes the least biological damage externally.
4) Name the radiation which is used in carbon dating.
What do you mean by Mass number.
Define atomic number of an element.
What do you mean by electron emission?
What are cathode rays? Why are they called ‘cathode rays’? Name a material which exhibits fluorescence when cathode rays fall on it.
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
How is a cathode ray tube used to convert an electrical signal into a visual signal?
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
