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cathode ray tube that emits electron rays
The following video provides you with the correct English pronunciation of the word "vacuum tube", to help you become a better English speaker.
|Wikipedia English The Free Encyclopedia||Download this dictionary|
In electronics, a vacuum tube, electron tube (in North America), thermionic valve, tube or valve is a device controlling electric current through a vacuum in a sealed container. The container is often thin transparent glass in a roughly cylindrical shape. Within the glass is a vacuum with a cathode and anode at either end. Electrons flow from the cathode to the anode through the vacuum, a demonstration of the Edison effect. The introduction of a grid between the cathode and anode makes it possible to amplify a current. A negative voltage applied to the grid will subdue the current traveling between cathode and anode through the vacuum by a larger value than the current applied to the grid. Hence the grid may be used to modulate the current through the tube.
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|WordNet 2.0 Dictionary||Download this dictionary|
1. electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
(synonym) tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve
(hypernym) electronic device
(hyponym) acorn tube
(part-holonym) circuit, electrical circuit, electric circuit
|Integrated Circuit Dictionary||Download this dictionary|
a tube contaning a low pressure gas and two or more metal plates that control the flow of electrons.
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|Free English-Vietnamese Dictionary||Download this dictionary|
vacuum-tube /'vækjuəm'tju:b/ (vacuum-valve) /'vækjuəm'vælv/
- danh từ
- (rađiô) đèn chân không
- (rađiô) đèn chân không
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