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संबंधित प्रश्न
How can they be made to leave the metal surface? (State any two ways)
Name the unit in which the work function of a metal is expressed.
What do you mean by Atomic mass
A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
Why should a radioactive substance not be touched by hands?
How is a cathode ray beam affected while passing through a magnetic field?
State any two uses of cathode rays.
Mention four properties of Becquerel rays.
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be ______.
Calculate the time interval between 33% decay and 67% decay if half-life of a substance is 20 minutes.
