论文部分内容阅读
在高二《物理》课本《交流电》习题中,A组第4题给了这样一段文字:“为了把送电电压变成适合用户的电压,要使用变压器.变压器原线圈中电流的变化引起铁芯中磁通量的变化,铁芯中磁通量的变化使得穿过副线圈的磁通量也变化,因而在副线圈中产生感应电动势.根据法拉第电磁感应定律,副线圈中的感应电动势与磁通量的变化率成正
In the ”AC“ textbook of the ”Physics“ textbook in Grade Two, the fourth paragraph of Group A gave such a text: ”In order to change the transmission voltage into a voltage suitable for the user, a transformer is used. The change in the current in the primary coil of the transformer causes iron. The change of the magnetic flux in the core, the change of the magnetic flux in the iron core causes the magnetic flux passing through the secondary coil to also change, and thus generates an induced electromotive force in the secondary coil. According to Faraday’s law of electromagnetic induction, the rate of change of the induced electromotive force and magnetic flux in the secondary coil becomes positive.