用毕－萨定律计算圆平行板电容器极板上电流的磁场  

A CALCULATION OF MAGNETIC FIELD OF CURRENT DISTRIBUTED ON PLATES OF A CIRCULAR PARALLEL PARALLEL PLATE CAPACITOR BY BIOT-SAVART'S LAW

作　　者：李元勋[1] 

机构地区：[1]湖南教育学院物理系

出　　处：《大学物理》1996年第1期22-24,共3页College Physics

摘　　要：用毕－萨定律计算了分布在圆平行板电容器极板上电流的磁场，从而证实了：１）在似稳条件下磁场完全是由传导电流产生的，“位移电流”的磁场为零；２）极板电流在电路容器内部产生的磁场很大，它极大地的削弱了馈线电流的磁场，使得电容器内部的磁场很小．By calculating the magnetic field of the current distributed on the Plates of a parallel plate capacitor by Biot-Savart's law,it is concludeel that:1)Under quasi-steady conditions,the magnetic field is produced wholely by the conductive current and the magnetic field of the 'displacement current' is null;2) Within the capacitor,the magnetic field of the plate current is strong,and it capacitor becomes very weak.

关 键 词：位移电流 磁场 毕-萨定律 

分 类 号：O442[理学—电磁学]