电磁感应现象应用问题涉及到力和运动、动量、能量、电路、安培力等多方面的物理知识,综合性较强,是高考考查的热点内容.复习本部分知识要注意前后联系,做到融会贯通,以达到温故而知新、培养综合能力的目的.在电磁感应部分复习中,要抓住两条主线:(1)遵循“闭合电路欧姆定律”;( The application of electromagnetic induction phenomenon involves many aspects of physical knowledge such as force and movement, momentum, energy, circuit, and Ampere force. The comprehensiveness is strong and it is a hot content of the college entrance examination. Review this part of the knowledge should pay attention to before and after contact, and achieve the integration In order to achieve the purpose of updating the knowledge and training the comprehensive ability, we must grasp two main lines during the review of the electromagnetic induction part: (1) Follow the “closed circuit Ohm’s law”;