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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
A radioactive substance is oxidized. Will there be any change in the nature its radioactivity? Give a reason for your answer
Name a gas caused by the Greenhouse effect
A nucleus `""_11^24Na` emits a beta particle to change into Magnesium (Mg)
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?
A nucleus is \[\ce{^24_11 Na}\] β-radioactive.
Write the equation represent β-decay.
Define bound electrons.
What are the types of emission?
State any two uses of cathode rays.
What do you understand by the term radioactivity?
It is advised not to touch a radioactive substance by hand. Give reason.
Calculate the time interval between 33% decay and 67% decay if half-life of a substance is 20 minutes.
