| 词汇 | electromagnet |
| 释义 | electromagnet noun[ C ] physics specializeduk /iˌlek.trəuˈmæɡ.nət/ us /iˌlek.troʊˈmæɡ.nət/ a device made from a piece of iron that becomes magnetic when a changing current is passed through the wire that goes around it电磁铁;电磁体 Electrical components & circuitry accumulator AGM battery anode armature bandpass filter baseband chip cathode ray circuit breaker coil conductor LED display multicelled multiconductor negative pole number pad OLED photoresist photovoltaic cell relay transformer Hence the cause of the commonly received opinion among telegraph engineers that for rapid work electromagnets must have short cores. Many two-pole electromagnets show a tendency to bend together when the current is turned on. On heating the bulb the duration of the glow was greatly diminished, and it could be instantly extinguished by the presence of an electromagnet. The heater is cut out by an electromagnet when the glower goes into operation. We will now consider the actual mechanical construction of the electromagnet. Examples of electromagnetelectromagnet A current to the electromagnet was supplied by a battery and was changed with a variable resistance. An electromagnet was used in order to produce a magnetic field. This consists of an electromagnet that deflects electrons away from the axis. At the top of the columns an electromagnet is attached holding up a screen. Only when the current of the electromagnet is broken does the card become visible through an opening in the screen. But the functioning electromagnet necessitates the existence of the field. To increase the torque transmission capacity, another shear disk is added on the other side of the electromagnet coil, forming a symmetrical structure. The electromagnet's current links the display of time on the clockface with the measurement device in the chronoscope. Consider an electromagnetic field surrounding an electromagnet. Voltages induced in the receivers by three fixed electromagnets situated around the subject's head were used to determine location of the receivers in the midsagittal plane. I do not know whether they are using electromagnets or something like that, but they appear to hoover the sea. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 With this configuration the armature is through-bolted through the door and oriented to mate with the face of the electromagnet. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The central controller system vibrated the electromagnet like an audio-speaker voice coil. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Eventually, single-channel gave way to multi channel devices (at significantly higher cost) with various audio tones driving electromagnets affecting tuned resonant reeds for channel selection. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This "musical telegraph" used steel reeds with oscillations created by electromagnets transmitted over a telegraphy line. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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