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研究电灯泡灯丝电阻是学生课外实验。金属导体的电阻一般跟温度有密切关系,冷热电阻差异很大。我们设计了一个研究灯泡灯丝电阻随功率而变化的实验,供参考。 (一)原理和实验装置实验电路如图1所示。选用“220V、15W”电灯泡
Study light bulb filament resistance is a student’s extracurricular experiment. The resistance of a metal conductor is generally closely related to the temperature, and the resistance of the cold and the hot is very different. We have designed an experiment to study the change of bulb filament resistance with power for reference. (a) Principles and Experimental Devices The experimental circuit is shown in Fig. 1. Select “220V, 15W” Light Bulb