论文部分内容阅读
场和路构成了电学的主要内容,而电路中的主要问题是电路的分析和计算.其中电路的动态分析一直倍受命题者的青睐,因为这类题型有利于考查学生的判断推理能力、逆向思维能力及半定量分析能力.本文结合高考题和平时的习题教学,将电路动态分析问题作一归类,旨在说明这类题在考查学生能力方面如何向纵深发展的,供同行参考.1 改变滑动变阻器阻值引起电路中参量的单调变化[例1](1989年)如图所示电路,当滑线变阻器的滑动触头向b端移动时
Field and road constitute the main content of electricity, and the main problem in the circuit is the analysis and calculation of the circuit. The dynamic analysis of the circuit has always been favored by propositioners, because such questions are conducive to examine students’ ability of reasoning and reasoning. Reverse thinking ability and semi-quantitative analysis ability. This article combines the college entrance examination questions and the exercise of peacetime exercises, and classifies the dynamic analysis problems of the circuit. It aims to illustrate how such questions are developed in depth in the examination of students’ abilities. 1 Changing the resistance of the sliding rheostat causes a monotonic change in the parameters of the circuit [Example 1] (1989) Circuits shown in the figure, when the slide contact of the sled varistor moves to the b end