论文部分内容阅读
在初中物理课本第二册的第十章《电磁现象》一章中,安培定则、左手定则和右手定则无疑是教学的重点,也是学生学习这一章时的难点。不少学生不只是初学这三个定则时感到很困难,就是在他们升入高中以后进一步学习《磁场》和《电磁感应》两章时,还仍然存在着畏惧心理,成为他们进一步学习安培力、洛仑兹力和楞次定律的一大心理障碍。因此,能不能使学生较好地掌握和运用这三个定则,是这一章教学成败的关键。对此我做了一些初步的探索,下面谈谈自己的做法和几点粗浅的体会。一、弄清螺线管的线圈的绕向,是运用安培定则判定螺线管的磁场的关键在安培定则的教学中,我发现不少学生在判定螺线管的磁场时,面对螺线管的平面图,他
In the chapter “Electromagnetic Phenomenon” in the second chapter of the junior high school physics textbook, the Ampere’s rule, the left-hand rule, and the right-hand rule are undoubtedly the focus of teaching. It is also a difficult point for students to study this chapter. Many students feel that it is difficult not just to begin learning these three rules. It is because they continue to learn more about Magnetic Field and Electromagnetic Induction after they are enrolled in high school. They still have fear and become further learning of Ampere. , Lorenz force and Lenz’s law a major psychological barrier. Therefore, whether or not students can better master and use these three rules is the key to the success of this chapter. I have made some preliminary explorations of this, and here I will talk about my own practice and some superficial experiences. First, to clarify the winding of the coil of the solenoid is the key to determine the magnetic field of the solenoid by using the Ampere’s rule. In the teaching of the amperage rule, I have found that many students face when judging the magnetic field of the solenoid. Solenoid plan, he