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对于刚刚接触到电学知识的初中生而言,串、并联电路的判定是学习中的一个难点,也是重点,是整个电学部分学习的基础,能够准确地判断出串、并联电路是电学学习的关键。当电路中加入电表之后,电路的复杂程度加大,学生能否利用前面所学串、并联电路知识解决电表类问题又是后续电学学习的关键。为此,本文首先通过初中阶段电表与开关的某些联系帮助学生快速判定串、并联电路,然后,利用串、并联电路的相关知识解决电表类问题。
For junior high school students who have just reached the electrical knowledge, the judgment of series and parallel circuits is a difficult and important point in the study. It is the basis of the whole electrical part learning. It can accurately judge the series and parallel circuit is the key of electrical learning . When the meter is added into the circuit, the complexity of the circuit increases. Whether the students can use the knowledge of the series and the parallel circuits to solve the meter problem is the key to the subsequent electrical learning. To this end, this paper first through the junior high school meters and switches some of the links to help students quickly determine the series, parallel circuit, and then use the string, parallel circuit related knowledge to solve the problem of meter class.