THERMIONIC VALVE Meaning and
Definition
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A thermionic valve, also known as a vacuum tube or electron tube, is an electronic device widely used in the early days of electronic technology. It consists of a sealed glass or metal envelope containing two or more electrodes or elements, through which electrical current flows in a vacuum. The main purpose of a thermionic valve is to control and amplify electrical signals.
The key component of a thermionic valve is a heated cathode, also known as a filament, which emits electrons when heated to a high temperature. These emitted electrons are then attracted towards a positively charged anode, allowing current to flow through the valve. The valve may also include other electrodes, such as grids or plates, that can control and modify the flow of electrons, enabling the device to function as an amplifier, oscillator, or rectifier.
Thermionic valves were crucial in the development of various electronic devices and systems, including early radios, televisions, and telecommunication systems. However, with advancements in semiconductor technology, they have been largely replaced by solid-state devices, such as transistors. Nonetheless, thermionic valves continue to be used in specific applications where their unique characteristics, such as high power output, high voltage capability, or high-frequency operation, are advantageous.
In summary, a thermionic valve is an early electronic device that controls and amplifies electrical signals through the emission and control of electrons in a vacuum.
Common Misspellings for THERMIONIC VALVE
- rhermionic valve
- fhermionic valve
- ghermionic valve
- yhermionic valve
- 6hermionic valve
- 5hermionic valve
- tgermionic valve
- tbermionic valve
- tnermionic valve
- tjermionic valve
- tuermionic valve
- tyermionic valve
- thwrmionic valve
- thsrmionic valve
- thdrmionic valve
- thrrmionic valve
- th4rmionic valve
- th3rmionic valve
- theemionic valve
Etymology of THERMIONIC VALVE
The word "thermionic valve" is derived from two key elements: "thermionic" and "valve".
The term "thermionic" refers to the phenomenon of "thermionic emission". In 1873, Thomas Edison first discovered this effect in his laboratory. It involves the emission of electrons from a heated filament or cathode. The word "thermionic" is derived from the Greek words "thermos", meaning heat, and "ion", meaning "that which goes".
The term "valve" in this context refers to an electronic device that controls the flow of electrons. In the early days of electronics, vacuum tubes or valves were used as components in electronic circuits. The term "valve" was coined by Sir John Ambrose Fleming, a British engineer, in 1904 when he developed the first practical vacuum tube, known as the "Fleming valve".
Similar spelling words for THERMIONIC VALVE
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