论文部分内容阅读
上海市96、97年考题最后一道都是电学实验题,它们构思独特,不失为两道考查实验能力和分析能力的好题,现介绍如下:例1:(96试题)某同学在做《测定小灯泡功率》的实验中,所用电源电压为6伏,小灯泡的额定电压为3.8伏.在测定小灯泡的额定功率时,该同学发现实验所用电压表的0～15伏量程档坏了,而0～3伏量程档完好,实验所用的其它器材也都完好.在不更换实验器材的条件下,这位同学想了一个巧妙的办法测出了小灯泡的额定功率.请画出该同学的实验电路图,并
The last questions in Shanghai’s 1996 and 1997 exams were all electrical experiments. They were unique in concept and were two good questions for examining experimental and analytical abilities. They are described as follows: Example 1: (96 test questions) A classmate is doing In the experiment of the lamp power, the power supply voltage was 6 volts, and the rated voltage of the small light bulb was 3.8 volts. When measuring the rated power of the small light bulb, the student found that the 0-15 volt range of the voltmeter used in the experiment was broken. The 0 to 3 volts range was intact and the other equipment used in the experiment was still intact. Without changing the experimental equipment, the student thought about a clever way to measure the rated power of the light bulb. Please draw the classmate’s Experimental circuit diagram, and