electromagnet
含义: A type of magnet in which the magnetic field is produced by an electric current flowing through a coil of wire, and which can be switched on and off.
Unlike permanent magnets, electromagnets can be controlled — their strength can be adjusted by changing the current, and they can be turned off entirely. This makes them invaluable in applications from scrapyard cranes and electric motors to particle accelerators and MRI scanners. The related adjective 'electromagnetic' describes phenomena involving both electric and magnetic fields.
例句
- The crane uses a powerful electromagnet to lift and move heavy scrap metal across the yard. 起重机使用强力电磁铁在场地内吊运沉重的废金属。La grúa utiliza un potente electroimán para levantar y mover chatarra pesada por el patio.クレーンは強力な電磁石を使ってヤード内の重いスクラップ金属を持ち上げ移動させる。크레인은 강력한 전자석을 사용하여 야적장의 무거운 고철을 들어 올리고 이동시킨다.
- Electromagnets are a key component of electric motors, generators, and loudspeakers. 电磁铁是电动机、发电机和扬声器的关键组件。Los electroimanes son un componente clave de los motores eléctricos, los generadores y los altavoces.電磁石は電動モーター、発電機、スピーカーの主要部品である。전자석은 전동기, 발전기, 스피커의 핵심 부품이다.
- The physics teacher demonstrated how wrapping wire around an iron nail and connecting it to a battery creates a simple electromagnet. 物理老师演示了如何用电线缠绕铁钉并连接电池来制作简单的电磁铁。El profesor de física demostró cómo enrollar un alambre alrededor de un clavo de hierro y conectarlo a una pila crea un electroimán sencillo.物理の教師は、鉄釘に導線を巻いて電池に接続すると簡単な電磁石ができることを実演した。물리 교사는 철못에 전선을 감고 배터리에 연결하면 간단한 전자석이 만들어지는 것을 실험으로 보여주었다.
发音
用法指南
语境: academic, professional
语气: neutral
起源与历史
A compound of 'electro-' (from Greek elektron, amber, the source of static electricity observations) and 'magnet' (from Greek Magnesia, a region in Thessaly). Coined in the 1820s after William Sturgeon invented the first electromagnet.
文化背景
Era: Modern
Generation: All ages
Social background: Universal
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