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प्रश्न
An electrons emitter must have how much work function and melting point.
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उत्तर
An electron emitter must have low work function and high melting point.
संबंधित प्रश्न
When does the nucleus of an atom tend to become radioactive?
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.
What are isobars?
What happens to the atomic number of element when (i) An α -particle, (ii) A β -particle 1 and (iii) γ-radiation is emitted?
What are ‘Becquerel rays’?
State one use of radio-isotopes.
If 10% of a radioactive substance decays in every 5 years, then the percentage of the substance that will have decayed in 20 years will be ______.
Assertion (A): The force of repulsion between atomic nucleus and α-particle varies with distance according to inverse square law.
Reason (R): Rutherford did α-particles scattering experiment.
