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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
State three factors on which the rate of emission of electrons from a metal surface depends
Why do Free electrons not leave the metal surface on their own
An element `""_ZS^A` decays to `""_85R^222` after emitting 2 α particles and 1 β particle.
Find the atomic number and atomic mass of the element S.
An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?
What happens to the mass number of an element when (i) an α -particle, (ii) a β -particle, and (iii) γ -radiation is emitted?
Draw a diagram of a simple atom showing the nucleus and electrons. In this atom:
(a) What type of charge will there be on the nucleus?
(b) What is the value of this charge?
State two properties that a substance should possess when used as a thermionic emitter.
How is a cathode ray beam affected while passing through a magnetic field?
Which of the following statements is/are correct?
- α particles are photons
- Penetrating power of γ radiation is very low
- Ionization power is maximum for α rays
- Penetrating power of γ radiation is very high
