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What is the uses of thermionic emission?
electricity generation
How do you tell how hot or cold something is?
use a thermometer.We can feel how hot or cold something is. However, sometimes things are just too hot or cold for us to feel safely. At other times we need to know exactly how hot or cold something is. When we need to measure temperature correctly we need to use an instrument called a thermometer. This measures temperature in degrees Celsius [sometimes called centigrade] or degrees Fahrenheit. There are different types of thermometers for different situations. A medical thermometer, for example, needs to be very accurate. It measures in fractions of degrees. When we are ill, even tiny changes in temperature are important. Some thermometers use a liquid that moves up a very fine glass tube. Most room thermometers, and outdoor thermometers are like this. The liquid is either mercury [ which is poisonous] or coloured alcohol. As liquids get warmer they expand [get bigger], and move up the tube. Water expands too, but not as much as alcohol and mercury. Thermometers that might be used by small children are not made of glass. They use a digital display which lights up the temperature. Inside the displays are chemicals that change colour according to the temperature.
Where does the thermionic emission occur in cathode rays tube?
Basically the thermionic rays are fast moving electrons. They originate in the region having an excess of electrons. So originate from the cathode.
What is the name of the process by which electrons are released from a hot cathode?
thermionic emission
What instrument measures how hot or cold something is?
A thermometer is an instrument that measures cold and heat, together with temperature variations.
Who has invented first thermionic wave?
J.A.Fleming
What is the uses of thermionic emission?
electricity generation
Thermionic Emission of electron is due to?
Heat
How do you tell how hot or cold something is?
use a thermometer.We can feel how hot or cold something is. However, sometimes things are just too hot or cold for us to feel safely. At other times we need to know exactly how hot or cold something is. When we need to measure temperature correctly we need to use an instrument called a thermometer. This measures temperature in degrees Celsius [sometimes called centigrade] or degrees Fahrenheit. There are different types of thermometers for different situations. A medical thermometer, for example, needs to be very accurate. It measures in fractions of degrees. When we are ill, even tiny changes in temperature are important. Some thermometers use a liquid that moves up a very fine glass tube. Most room thermometers, and outdoor thermometers are like this. The liquid is either mercury [ which is poisonous] or coloured alcohol. As liquids get warmer they expand [get bigger], and move up the tube. Water expands too, but not as much as alcohol and mercury. Thermometers that might be used by small children are not made of glass. They use a digital display which lights up the temperature. Inside the displays are chemicals that change colour according to the temperature.
Where does the thermionic emission occur in cathode rays tube?
Basically the thermionic rays are fast moving electrons. They originate in the region having an excess of electrons. So originate from the cathode.
What is the derivation of Richardson's Equation of Thermionic Emission?
Rechardsons equation
What is the name of the process by which electrons are released from a hot cathode?
thermionic emission
Which device is similar to that of property of field effect transistor?
Thermionic valve
When does Thermionic emission occur during x-ray production?
thermionic emission occurs when the filaments are heated to a certain degree, causing the electrons to boil off and form a space charge or electron cloud.
What are the types of thermometer?
Celsius, Fahrenheit, and Kelvin.
The principle of heating a filament to obtain a movement of electrons is called?
Thermionic emission
What is meant by thermionic generation?
What is mean by thermionic generation is that electricity is created as a hot electrode will emit electrons onto a cold electrode. Elements like cesium are often used to help bridge the gap and improve the output.
