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电磁感应一章主要解决三个基本问题,楞次定律解决了感应电流的方向判断问题,法拉第电磁感应定律用于计算感应电动势的大小,而感应电流的大小只需运用闭合电路欧姆定律即可确定。因此,楞次定律、法拉第电磁感应定律是电磁感应一章的重点。另外,电磁感应的规律也是自感、交流电、变压器等知识的基础,因而在电磁学中占据了举足轻重的地位。
The chapter of electromagnetic induction mainly solves three basic problems. Lenz’s law solves the problem of determining the direction of induced current. Faraday’s law of electromagnetic induction is used to calculate the magnitude of induced electromotive force. The magnitude of induced current can only be determined by Ohm’s law of closed circuit . Therefore, Lenz’s law, Faraday’s law of electromagnetic induction is the focus of the chapter on electromagnetic induction. In addition, the law of electromagnetic induction is also self-inductance, AC, transformers and other knowledge-based, and thus occupy a decisive position in electromagnetics.