论文部分内容阅读
电学仪器选择与实验设计综合性强、涉及面广,对实验能力方面有较高水平的要求。是对学生创造性能力的考查。对此类问题有部分学生虽能得出正确的结果,但说不出选择仪器和设计电路的依据,本文谈谈分析解答此类问题的方法。一、选择电学仪器与设计实验电路的前提。1.了解实验器材的性能、原理、正确的使用方法及实验数据的记录和处理。如滑动变阻器是根据导体的电阻与导体的长度成正比的原理。改变接入电路的电阻大小的。电流表和电压表是根据通电线圈在磁场中所受力矩与指针偏转关系的原理制成的;欧姆表是
Electrical instrument selection and experimental design are comprehensive, involve a wide range of fields, and have high requirements for experimental capabilities. It is a test of students’ creative ability. Although some students on this type of problem can get correct results, but can not say the basis for the choice of instruments and circuit design, this article talks about the analysis and solution of such problems. First, the premise of selecting electrical instruments and designing experimental circuits. 1. Understand the performance, principle, correct use of experimental equipment, and recording and processing of experimental data. For example, the sliding rheostat is based on the principle that the resistance of the conductor is proportional to the length of the conductor. Change the size of the resistance of the access circuit. The ammeter and the voltmeter are made according to the principle of the relationship between the moment of the energizing coil and the deflection of the pointer in the magnetic field; the ohmmeter is