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在解答物理计算题时,若能注意从不同的角度进行探索,拓宽思路,往往会得到多种不同的解法。本文结合一道电学计算题说明如何从不同的角度求解。 题目 额定功率为2瓦的小灯泡,与一阻值为4欧姆的电阻串联后,接入6伏的直流电源上,恰能正常发光。求小灯泡的电阻和额定电压的可能值。 分析:此题是串联电路,有以下关系式
When solving physical computing problems, if you can pay attention to explore from different perspectives and broaden your thinking, you will often get a variety of different solutions. This article combines an electrical calculation problem to illustrate how to solve from different perspectives. Title A small bulb rated at 2 watts, connected in series with a resistor with a resistance of 4 ohms, is connected to a 6-volt DC power supply and emits light as normal. Find the possible value of the resistance and the rated voltage of the small lamp. Analysis: This question is a series circuit, with the following relationship