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滑动变阻器是电学中常用器件之一,在初级阶段由于学生认知水平有限,我们的教学要求,只掌握滑动变阻器的以下控制作用,将滑动变阻器与电源和其他元件以串联形式的连接.我们把这种接方法——叫“限流接法”.如图1.该电路通常研究测电阻和测功率,是初中阶段重要的实验.它的工作原理是通过改变接入电路部分电阻线的长度来改变电阻.在连接滑动变阻器时,要求:一上一下,各用一个接
Slide rheostat is commonly used in electrical devices, due to the limited cognitive level of students in the early stages of our teaching requirements, only to master the sliding rheostat the following control, the sliding rheostat and the power supply and other components in series connection.We put This connection method - called “current limiting connection”, as shown in Figure 1. This circuit is usually studied resistance and power measurement is an important experiment in the junior high school stage. It works by changing the access circuit part of the resistance line Of the length to change the resistance in the connection slip rheostat, the requirements: one last look, each with a