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noun Electronics.
a two-element vacuum tube in which the flow of electrons is under the influence of an external magnetic field, used to generate extremely short radio waves.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Magnetron
is always a great word to know.
So is reactance. Does it mean:
| opposition of inductance and capacitance to alternating current |
| square root of arithmetic mean of squares of the numbers in given set of numbers |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
magnetron  (māg'nĭ-trŏn') Pronunciation Key
An electron tube that produces coherent microwave radiation. Magnetrons are diodes in which the electrons traveling to the anode are set in spiraling paths by a magnetic field created by permanent magnets. The circular component of the electrons' motion causes microwave-frequency oscillations in the voltage induced in resonating cavities built into the anode, which is connected to an antenna that emits the microwaves. Magnetrons are used in radar and in microwave ovens. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia
magnetron
diode vacuum tube consisting of a cylindrical (straight wire) cathode and a coaxial anode, between which a dc (direct current) potential creates an electric field. A magnetic field is applied longitudinally by an external magnet. Connected to a resonant line, it can act as an oscillator. Magnetrons are capable of generating extremely high frequencies and also short bursts of very high power. They are an important source of power in radar systems and in microwave ovens.
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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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