考测点导航电阻是导体本身的性质,反映导体对电流的阻碍作用,决定电阻大小的因素是导体本身的材料、长度、横截面积以及温度。研究多变量因素的物理过程中采用“控制变量法”是需要理解的科学方法。变阻器是一种常用的电学基本仪器,熟练掌握变阻器的接法、用法,以达到实验研究的需要,认识各种电路连接中变阻器所起的作用是分析电路的基础。考测重点是电阻是导体的属性和 The test point navigation resistance is the nature of the conductor itself, reflecting the conductor’s resistance to the current. The factors that determine the magnitude of the resistance are the material, length, cross-sectional area, and temperature of the conductor itself. The use of “control variable method” in the physical process of studying multivariate factors is a scientific method that needs to be understood. Varistor is a common electrical basic instrument. It masters the connection and usage of varistors to meet the needs of experimental research. Recognizing the role of varistors in various circuit connections is the basis for analyzing circuits. The focus of the test is that the resistance is the property of the conductor and