The iron which is magnetized by the current passing around it is called the core. 佚名.神奇的知识之书.
Inasmuch, however, as there is nothing to hinder, current would flow from battery C through wire B, and the bar would therefore be magnetized. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Steel is less affected than soft iron for the time, but remains permanently magnetized after the current ceases. 佚名.神奇的知识之书.