Thermionic-current
noun
1.
an electric current produced by the flow of thermions.
thermionic current
noun
1.
an electric current produced between two electrodes as a result of electrons emitted by thermionic emission
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noun 1. the emission of electrons from very hot solids or liquids: used for producing electrons in valves, electron microscopes, X-ray tubes, etc
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noun, (used with a singular verb) 1. the branch of physics that deals with thermionic phenomena. noun 1. (functioning as sing) the branch of electronics concerned with the emission of electrons by hot bodies and with devices based on this effect, esp the study and design of thermionic valves
- Thermionic-tube
noun, Electronics. 1. a vacuum tube in which the cathode is heated electrically to cause the emission of electrons by thermal agitation. thermionic tube (thûr’mī-ŏn’ĭk) An electrical component, typically an electron tube, through which electric current flows via the emission of thermions from a heated cathode.
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noun, British. 1. vacuum tube. thermionic valve noun 1. an electronic valve in which electrons are emitted from a heated rather than a cold cathode
- Thermistor
noun, Electronics. 1. a resistor whose action depends upon changes of its resistance material with changes in temperature. noun 1. a semiconductor device having a resistance that decreases rapidly with an increase in temperature. It is used for temperature measurement, to compensate for temperature variations in a circuit, etc thermistor (thûr’mĭs’tər) A resistor whose resistance […]