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The basic working principle of a vacuum tube is a phenomenon called thermionic emission. 

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Important Questions on Electron Emission

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Physics>Modern Physics>Electron Emission>Vacuum Tubes
Cotyledons are also called-
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
What is meant by vacuum tube?
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
What are the disadvantages of vacuum tubes?
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
Which materials are used to construct vacuum tubes?
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
The vacuum tubes are also known as _____.
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
What is a vacuums tube?
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
A vacuums tube is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
List the types of vacuum tube.
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
How does the vacuum tube work?
 
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Physics>Modern Physics>Electron Emission>Vacuum Tubes


What are vacuum tubes?
 

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Physics>Modern Physics>Electron Emission>Vacuum Tubes
What is vacuum tube and how does it work?
 
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
The basic working principle of a vacuum tube is a phenomenon called_____?
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
The basic working principle of a vacuum tube is a phenomenon called________________________? 
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
A vacuum tube consists of two or more_____ in a vacuum inside an airtight envelope.
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
A vacuum tube, electron tube, valve or tube  is a device that controls electric current flow in a_______________vacuum between electrodes to which an electric potential difference has been applied.
 
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
A vacuum tube consists of two or more electrodes in a vacuum inside an airtight envelope. 
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
An electronic device that controls the flow of electrons in a vacuum.
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
Vacuum tubes are made from the materials such as_____?
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Physics>Modern Physics>Electron Emission>Vacuum Tubes
In any modern-day electrical device—from alarm clocks to phones to computers to televisions—you'll find a device called a ______________________?