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当前,新课改下的物理课程不仅要求重视实验,还要加强实验的创新。《物理》(选修3-1)中“磁场对通电导线的作用力”一节中的“做一做”实验,是将一个装有导电液体的圆形玻璃皿放在磁场中,在玻璃皿的中心和内壁分别接有电源的正负极,这样就会观察到液体旋转起来,以此来感知安培力并验证左手定则。笔者经过多次教学实践,认为可对实验进行一些创新和改进,以便收到更好的教学效果,真正实现高效课堂。
At present, the new curriculum under the physical curriculum requires not only emphasis on experiments, but also to strengthen experimental innovation. The “Do It Again” experiment in the section “Forces in Magnetic Field on Conducting Wires” in Physics (elective 3-1) places a round glass dish containing a conductive liquid in a magnetic field , In the center of the glass and the inner wall were connected to the positive and negative power supply, so you will observe the liquid spin up, in order to sense the Ampere force and verify the left-hand rule. After repeated teaching practice, the author thinks that some innovations and improvements can be made to the experiment in order to receive better teaching effects and truly achieve efficient classroom.