An electromagnet is a device that produces a magnetic field when an electric current flows through it.
电磁铁是一种当电流通过时产生磁场的装置。
The electromagnet is widely used in various industries, such as automotive and robotics.
电磁铁在汽车和机器人等行业中被广泛应用。
The strength of the electromagnet can be adjusted by changing the amount of current flowing through it.
通过改变流经电磁铁的电流量，可以调整其磁力强度。
Electromagnets are non-permanent magnets, losing their magnetic properties when the power is turned off.
电磁铁是非永久磁体，断电后会失去磁性。
In MRI machines, powerful
electromagnets create a strong magnetic field to align atomic nuclei.
在核磁共振成像机中，强大的电磁铁产生强磁场以使原子核对齐。
An electromagnet is composed of a coil of wire wrapped around a core, which enhances the magnetic field.
电磁铁由缠绕在铁芯周围的线圈组成，这增强了磁场。
Electromagnets are used in doorbells, where they attract a metal strike to produce a sound.
电磁铁用于门铃，它们吸引金属锤击产生声音。
Electric bells rely on
electromagnets to create the force that pulls the clapper back after striking.
电铃依赖电磁铁来产生敲击后将撞锤拉回的力量。
Engineers design
electromagnets for different applications, like lifting heavy objects or controlling machinery.
工程师为不同的应用设计电磁铁，如提升重物或控制机械。
When a current flows through an electromagnet, it creates a magnetic field that can be used to pick up ferromagnetic materials.
当电流流过电磁铁时，它会产生一个可以用来吸附铁磁性材料的磁场。
They use electromagnets and especially designed tracks to keep the trains from overturning or derailing.
The train uses electromagnets to suspend itself above the rails, and because there is no friction from contact with the rail lines, the train can run quietly and smoothly, said Liang Jianying, CRRC Qingdao Sifang's deputy general manager and chief engineer.
据中国中车青岛四方机车车辆股份有限公司副总经理兼总工程师梁建英介绍，该列车利用电磁铁使其悬浮于轨道之上。由于无与轨道线接触产生的摩擦力，列车得以安静、平稳地运行。
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