名词<物>电磁体，电磁铁
1. 电磁铁;电磁体
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.
noun
1. a temporary magnet made by coiling wire around an iron core
when current flows in the coil the iron becomes a magnet