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安培力的方向和大小是电磁场部分的重点。磁场对通电导线的作用力是对磁场力的性质的深入研究,它的研究架起了力学和电磁学联系的桥梁。弄清安培力、电流、磁感应强度三者方向的空间关系是该节难点。因此通过实验探究的方法归纳出“通电导线在磁场中受力”的规律,在教材中起到了承前启后的
Ampere force direction and size of the electromagnetic field is the focus of the part. The effect of the magnetic field on the conducting wire is an in-depth study of the nature of the magnetic field force. Its research has taken the bridge of mechanics and electromagnetism. It is a difficult point to understand the spatial relationship between amperage, current and magnetic flux density. Therefore, through the method of experimental exploration, the law of “energized conductor in the magnetic field” is deduced, playing an important role in the textbook