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高中物理第二册“磁场”一章中,通电导体在磁场中的受力方向用左手定则判定;“电磁感应”一章中,闭合回路中一段导体切割磁感线运动时,感应电流的方向用右手定则判定.而在教学实际中,学生往往会碰到既要判定导体切割磁感线运动产生感应电流的方向、又要判定通电导体在磁场中受力方向的问题,这时最容易出现的失误是把应该用左手的用成了右手,把应该用右手的用成了左手,这样就给不少学生造成了
In the second chapter of the Physics of High School “Magnetic field” chapter, the force direction of the energized conductor in the magnetic field is determined by the left-hand rule; in the chapter “Electromagnetic induction”, when the conductor in the closed loop is moved by the magnetic induction line The direction of the induced current is determined by the right-hand rule. In teaching practice, students often encounter the problem of determining both the direction in which the induced magnetic current of the conductor cuts the induced current and the direction of the energized conductor in the magnetic field. At this time, the easiest mistake is to use the left hand as the right hand and the right hand as the left hand, which will cause a lot of students