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开放型问题在中考中属于热点问题,这类问题比较复杂,但是如果能够按照一定思路逐步分析,可以化简为易。本文就解决开放电路问题的思路做一分析。一、思路首先,分析电路的初末状态、开关闭合前后以及滑动变阻器滑片移动前后的电路连接方式;其次,分析各电表的作用;再次,判断阻值和电路的变化;最后,利用规律进行解题。
Open-ended questions are hot topics in senior high school entrance examinations. Such questions are rather complicated, but if they can be gradually analyzed according to certain ideas, they can be simplified to be easier. This article to solve the problem of open circuit to do an analysis of the train of thought. First, the idea First of all, the circuit analysis of the initial and final state before and after the closure of the switch and the sliding rheostat vane before and after the movement of the circuit connection; second, the role of the meter analysis; again, to determine resistance and circuit changes; Finally, the use of law Solve the problem.