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中学使用的交流发电机教具结构复杂,可视性差,应用具有“磁王”之称的钕铁硼磁性材料制成的强磁体,单匝线圈在磁场中转动也可以产生明显的感应电流,仅用一节干电池供电也可以使线圈产生明显的转动效果.
The AC generator used in secondary schools has a complicated structure and poor visibility. The application of a strong magnet made of a magnetic material called “magnetic king” of NdFeB makes it possible to produce a significant induced current by turning a single turn coil in a magnetic field, Only a single battery power supply can also be a significant rotation of the coil effect.