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电路教学是初中物理教学的重点和难点之一。因此,电路教学中应讲透本质、提炼方法、加强演示,通过实验形成概念与规律。 1 讲透本质提炼方法 电路教学的首道难关是识别电路连接方式,教材给串联、并联下了定义:把电路元件逐个顺次连接起来的方法叫串联。我认为“依次”的本质是电流没有分合,所以串联的特征是“电流无分无合”。把电路元件并列接在电路两点
Circuit teaching is one of the key and difficult aspects of junior middle school physics teaching. Therefore, in the circuit teaching, we should thoroughly explain the essence, refine the method, strengthen the demonstration, and form the concepts and laws through experiments. A thorough understanding of the essence of the refining method Circuit teaching is the first difficult way to identify the circuit connection, teaching materials for the series, parallel under the definition: the circuit components are connected sequentially one by one called the serial. I think that the essence of “sequential” is that there is no division of currents, so the characteristic of series is “current no matter what”. Connect the circuit elements in parallel at two points in the circuit