滑动变阻器采用分压式接法具有电压、电流变化范围大等优点。不少电学实验,滑动变阻器必须接成分压形式。在电压、电流满足实验条件下,分压接法的滑动变阻器阻值选取是个颇有争议的问将滑题。动笔变者阻认为器有接必成要予以澄清。分压式对外供电,可使负载电阻RL两端的电压、电 Sliding rheostats use voltage-divided connections with the advantages of voltage and current range. For many electrical experiments, the sliding rheostat must be in the form of a pressure component. Under the condition of voltage and current satisfying the experimental conditions, the selection of the resistance value of the sliding rheostat in the partial pressure connection method is a controversial issue. Penalizers believe that devices must be clarified. Partial pressure type external power supply enables voltage and power at both ends of the load resistor RL