Electromagnetism

(noun.) the branch of physics concerned with electromagnetic phenomena.

(noun.) magnetism produced by an electric current; 'electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it'.

校对:威尔默

• This is accomplished through the utilization of the phenomena of electromagnetism. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.

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