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笔者在教互感线圈同名端的判别方法时,归纳一些简易的口诀,让学生在理解的基础上进行记忆,在解题方面能快速应用并降低难度。如何确定两电磁线圈的同名端?我们知道:互感线圈的感应电动势极性始终保持一致的端点,称为同名端。在判别时是假定两种情况来加以说明的:如图1所示,当线圈L1通入电流(i),并且电流随着时间增加时,电流(i)所产生的自感磁通和互感磁通也随时间增
The author teaches the discriminating method of the homonymic end of the induction coil, and sums up some simple recipes to allow students to memorize on the basis of understanding, and to quickly apply and reduce difficulty in solving problems. How to determine the name of the two electromagnetic coils? We know that the polarity of the induced electromotive force of the mutual inductance coil always remains the same, which is called the end of the same name. In the discrimination, it is assumed that two situations are used to describe: As shown in FIG. 1, when the current (i) is applied to the coil L1, and the current increases with time, the self-inductance flux and mutual inductance generated by the current (i) are generated. Magnetic flux also increases with time