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उत्तर
Cathode rays are used for:
(i) Converting electrical signal into a visual signal, (ii) In television.
संबंधित प्रश्न
Why do Free electrons not leave the metal surface on their own
State the energy conversion taking place in a cathode ray tube
When is said to be the nucleus unstable?
What do you mean by Mass number.
Radioactive substances were found to give off three types of rays. Name them. How do they
(a) React to the magnetic field?
(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
In a cathode ray tube state the purpose of covering cathode by thorium and carbon.
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z + 1}Y + ^0_{-1}β}\]
Two radioactive materials A and B have decay constants 25λ and 16λ respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of B to that of A will be "e" after a time `1/("a"lambda)` The value of a ______.
In the following atoms, which one is a radioisotope? Give one use of this isotope.
O16, C14, N14, He4
