Thermionic Emission

IMPORTANT

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

HARD
IMPORTANT

What does thermionic emission means? List the factors affecting thermionic emission.

MEDIUM
IMPORTANT

In the experimental set up to show thermionic electron emission, there are deflecting plates, fluorescent screen, variable resistance.

MEDIUM
IMPORTANT

Thermionic electron emission can be done by cathode ray tube. Explain.

MEDIUM
IMPORTANT

The experimental set up to produce thermionic electron emission can be cathode ray tube.

MEDIUM
IMPORTANT

Explain the experimental set up to produce thermionic electron emission.

EASY
IMPORTANT

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.

EASY
IMPORTANT

Thermionic emission is dependent on temperature.

EASY
IMPORTANT

State two characteristics of the substance used as a thermionic emitter.

EASY
IMPORTANT

The substance which is used a good thermionic emitter should possess High work function and Low melting point.

EASY
IMPORTANT

Name a substance that is a good thermionic emitter.

EASY
IMPORTANT

The characteristics that material should possess to act as a good thermion emitter are Low work function and High _____ point.

EASY
IMPORTANT

State the characteristics required for a good thermionic emitter. 
 

EASY
IMPORTANT

State three factors on which the rate of emission of electrons from a metal surface depends.

EASY
IMPORTANT

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?