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What is emission current?

Important Questions on Electron Emission

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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
Thermionic emission occurs in 
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation

Correct the following sentence:

The emission current density from a heated filament obeys Child's law.

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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
By what equation thermionic equation is explained?
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
A Vacuum tube will conduct only if its plate is_______with respect to the cathode.
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
A Vacuum tube can be used as 
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation

Correct the following sentence:

In thermionic emission current varies with temperature of the filament as T1/2.

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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
The thermionic emission current is given by:
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation

In thermionic emission, the thermionic current varies with temperature of the filament as:

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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
A Vacuum tube is normally operated in the temperature saturation region.
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
Write Richardson-Dushman equation of thermionic equation?
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
For a given plate voltage. if -ve potential on the control grid of triode is increased, the plate current
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
What emitter is used in X-ray tube?
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
The emission current density from a heated filament obeys _____ law.
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
Thermionic emission is dependent on temperature:
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
What are the advantages of indirectly heated cathode over the directly heated cathode?
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
Why cathode is heated in vacuum.
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
Cotyledons are also called-
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
There is an increase in threonic current when the
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
Cathodes are coated with barium oxide to lower the thermionic work function.
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Physics>Modern Physics>Electron Emission>Richardson-dushmann Equation
How many types of electron emission exist?