An electromagnet is a magnet that consists of a piece of iron or steel surrounded by a coil. The metal becomes magnetic when an electric current is passed through the coil.
英漢詞典釋義
n.
<物>電磁體;電磁鐵
To make an electromagnet you need to send a current through the wire.為了做成電磁體你需要對金屬線送電。
英英詞典釋義
Noun
1. a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet