Thermionic Emission
Thermionic Emission: Overview
In this topic, we will look upon the rate of thermionic emission with the factors affecting it. It also explains the different kinds of thermionic emitters with their applications of thermionic emission.
Important Questions on Thermionic Emission
What does thermionic emission means? List the factors affecting thermionic emission.
In the experimental set up to show thermionic electron emission, there are deflecting plates, fluorescent screen, variable resistance.
Thermionic electron emission can be done by cathode ray tube. Explain.
The experimental set up to produce thermionic electron emission can be cathode ray tube.
Explain the experimental set up to produce thermionic electron emission.
The number of thermions emitted per second from a substance is known as the rate of thermionic emission. This value depends on the Surface Area.
Thermionic emission is dependent on temperature.
State two characteristics of the substance used as a thermionic emitter.
The substance which is used a good thermionic emitter should possess High work function and Low melting point.
Name a substance that is a good thermionic emitter.
The characteristics that material should possess to act as a good thermion emitter are Low work function and High _____ point.
State the characteristics required for a good thermionic emitter.
State three factors on which the rate of emission of electrons from a metal surface depends.
What is the factor upon which the rate of thermionic emission, defined as the number of thermions emitted per second from a substance, primarily depends?
