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滑动变阻器是物理教学中常用的仪器,在初中电学演示及分组实验中经常当做限流电阻使用。滑动变阻器的原理以及接线方法是教学中的重点之一。为了让学生更直观地接受并理解滑动变阻器的原理以及接线方法,笔者将原江苏师院教仪厂早年产品J2354—2型滑线变阻器改装成滑动变阻器原理演示仪。
The sliding rheostat is a commonly used instrument in physics teaching. It is often used as a current limiting resistor in junior high school electrical demonstrations and group experiments. The principle of the sliding rheostat and wiring method is one of the key points in teaching. In order to allow students to more intuitively understand and understand the principle of the sliding rheostat and the wiring method, the author converted the J2354-2 sled line varistor from the original Jiangsu Normal University Teaching Instrument Factory to the demonstration device of the sliding rheostat principle.