关于基尔霍夫电压定律的教学尝试

Attempts to Improve Teaching based on Kirchhoff Voltage Law

高职学生在应用基尔霍夫电压定律建立方程求解电路的电压、电流问题时,出现错误多数是由于定律的传统数学表达式中包含两套正、负号的使用混乱造成。作者经反复推敲,发现定律可用另一种数学表达式,且能减少一套正、负号。多年的教学尝试发现,定律的这一数学表达式学生更容易掌握。

The students in higher vocational colleges make some mistakes when they apply Kirchhoff Voltage Law to solve the voltage and current in circuit. And these mistakes results in the traditional mathematical expression of the law in which two sets of positive and negative signs are confusedly used. The author discovers another mathematical expression of the law can solve the problem after years teaching.