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测定小灯泡的电功率是初中物理的一个重要实验内容,不仅各地的中考会频频地考查,就连各地的理化实验考试也是必考的一个物理实验.如何测定小灯泡的额定功率,对同学们来说更是一个难点.为了提高同学们的实验技能和思维能力.一电压表某量程损坏1.器材:6 V电源、小灯泡(U额=3.8 V)、电压表(0~15V量程已损坏)、电流表、滑动变阻器(最大电阻值与小灯泡正常发光时的电阻差不多)、开关各一个,导线若干.
Determining the electrical power of small bulbs is an important experimental content of junior high school physics, not only around the exam will be frequently examined, and even physical and chemical experiments around the test is also a physical experiment. How to measure the rated power of small bulbs, to classmates Said to be more difficult. In order to improve the students’ experimental skills and thinking ability. A voltmeter range damage 1. Equipment: 6 V power supply, small bulb (U amount = 3.8 V), voltmeter (0 ~ 15V range has been damaged ), Ammeter, sliding rheostat (the maximum resistance and light bulb normal light when the resistance is almost), a switch, a number of wires.