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प्रश्न
Write one use of cathode ray tube.
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उत्तर
A cathode ray tube is used to investigate the waveform of an unknown alternating potential by applying it on the Y-plates and a known periodic time-base potential on the X-plates
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संबंधित प्रश्न
Why do Free electrons not leave the metal surface on their own
In the following fig. shows a radioactive source S in a thick lead container. The radiations pass through an electric field between the plates P and Q. Complete the diagram to show the paths of α , β and γ radiations.
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Radioactive substances were found to give off three types of rays. Name them. How do they
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(b) React to the electric field?
(c) Act when different thickness of lead sheets is placed in their path?
What is nucleus of an atom? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number its atomic model.
What happens to the position of an element in the periodic table when it emits an alpha particle
Define free electrons.
What are the types of emission?
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The mean lives of a radioactive substance are 1620 and 405 years for β-emission and β-emission respectively. The time after which three fourth of a sample will decay if it is decaying both by β-emission and β-emission simultaneously will be ______ years.
(Take ln 2 = 0.693)
Assertion (A): Hydrogen atom consists of only one electron but its emission spectrum has may lines.
Reason (R): Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
