滑动变阻器作为一个电路元件,在具体使用过程中我们要考虑它的规格。因此,选择合适的滑动变阻器也是一个重要的问题。1.欧姆定律问题中滑动变阻器的规格例1(2016年宿迁市中考题)在做“探究导体中电流跟电阻的关系”的实验中,实验器材有:学生电源(3 V不变),电流表、电压表、定值电阻四只(5Ω、10Ω、20Ω、25Ω各一只),滑动变阻器M(10Ω1 A),滑动变阻器N(20Ω1 A),开关、导线若干。 Sliding rheostat as a circuit component, in the specific use of the process we have to consider its specifications. Therefore, the choice of a suitable sliding rheostat is also an important issue. 1. Ohm’s law in the problem of sliding rheostat specifications Example 1 (Suqian 2016 senior high school entrance examination questions) In doing experiments to explore the relationship between current and resistance in conductors, the experimental equipment: student power supply (3 V unchanged) , Ammeter, voltmeter, setting resistance four (5Ω, 10Ω, 20Ω, 25Ω each one), sliding rheostat M (10Ω1 A), sliding rheostat N (20Ω1 A), switch, a number of wires.