thermionic emission sentence in Hindi
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- In an EI ion source, electrons are produced through thermionic emission by heating a wire filament that has electric current running through it.
- The thermionic emission current density, J, rises rapidly with increasing temperature, releasing a significant number of electrons into the vacuum near the surface.
- When the light is turned on, the electric power heats up the cathode enough for it to emit electrons ( thermionic emission ).
- "' Semiconductor devices "'are electronic components that exploit the solid state as opposed to the gaseous state or thermionic emission in a high vacuum.
- In vacuum tubes, a "'hot cathode "'or "'thermionic cathode "'is a cathode electrode which is heated to make it emit electrons due to thermionic emission.
- In the limit of large current densities, " J " is given by the Child-Langmuir equation below, rather than by the thermionic emission equation above.
- When deposited by thermal evaporation ( deposition ), cadmium arsenide displayed the Schottky ( thermionic emission ) and Poole Frenkel effect at high electric fields.
- These unusual classes of compounds have allowed Dye to achieve work functions as low as 0.2 electronvolts _ low enough for thermionic emission at-80 degrees Celsius.
- Heavy ions can also be generated with an Ion Gun which typically uses the thermionic emission of electrons to ionize a substance in its gaseous state.
- The increased power dissipation at tube ends also usually means cold cathode tubes have to be run at a lower loading than their thermionic emission equivalents.
- For low electrode wear the electrodes are usually made of tungsten, which has the highest melting point of any metal, to handle the thermionic emission of electrons.
- Although thermionic emission was originally reported in 1873 by Frederick Guthrie, it was Thomas Edison's apparently independent discovery of the phenomenon in 1883 that became well known.
- This does not mean the electrodes are cold ( indeed, they can be very hot ), but it does mean they are operating below their thermionic emission temperature.
- These unusual classes of compounds have allowed Dye to achieve work functions as low as 0 . 2 electronvolts _ low enough for thermionic emission at-80 degrees Celsius.
- The photomultiplier tube is an extremely sensitive detector of light, which uses the photoelectric effect and secondary emission, rather than thermionic emission, to generate and amplify electrical signals.
- Modern vacuum tubes use thermionic emission, in which the cathode is made of a thin wire filament which is heated by a separate electric current passing through it.
- As he continued to study filaments in vacuum and different gas environments, he began to study the emission of charged particles from hot filaments ( thermionic emission ).
- Phototubes and photomultipliers rely on electron flow through a vacuum, though in those cases electron emission from the cathode depends on energy from photons rather than thermionic emission.
- Furthermore, both lanthanum hexaboride and tungsten thermionic sources must be heated in order to achieve thermionic emission, this can be achieved by the use of a small resistive strip.
- A cathode made of a wire filament heated red hot by a separate current passing through it would release electrons into the tube by a process called thermionic emission.
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