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电学黑盒问题是一种训练学生灵活运用学过的电路规律分析和解决问题的好形式,解答者犹如“侦探”破案,一会儿山重水复,一会儿柳暗花明,真是扑朔迷离,盎然有趣.等解答完毕,回首一看,盒内电路原来如此简单.但其答案有时不止一个,高兴得太早了难免有漏网之“鱼”.这个问题很令“侦探”们头痛.因此,解决此类问题既要大胆想象,又要周密、细致,由简到繁,并要因果兼顾,反复推敲修改方可. 电阻的连接,最简单的形式莫过于串联了.因此,我们可以先从电阻的串联入手,画出一串联形式,然后根据题目条件,从电阻之间引出一些抽头,调整后画入
The black box problem is a good form of training students to flexibly use the learned circuit laws to analyze and solve problems. The answer is like a “detective” case. It will be heavy and heavy for a while. It will be confusing and amusing. When the answer is finished, Looking back, the circuit inside the box was so simple. But the answer was sometimes more than one. It was too early to be happy. There was a “fish” that couldn’t escape the net. This problem made the “detective” people headache. Therefore, to solve this kind of problem must be bold. Imagination, but also careful, detailed, from simple to complex, and take cautious considerations, repeated scrutiny can be modified. Resistor connection, the simplest form than in series. Therefore, we can start with the resistance of the series, draw A series form, then according to the conditions of the problem, draw some taps from the resistance, draw after adjustment