电容器和螺绕环转动时电磁场的角动量

Angular Momentum of Electromagnetic Fields for Capacitor and Toroid in Rotation

分别计算了理想的圆柱形电容器、圆形平行板电容器和螺绕环这三者绕各自中心对称轴做定轴转动时电磁场对转轴的角动量.计算结果或许没有什么实用价值,但应该具有一定的理论认识价值,即该计算结果从一个侧面体现了电磁场这种物质形态的一点特殊性.

Angular momentum of electromagnetic fields for ideal cylindrical capacitor,circular parallel-plate capacitor and toroid,both rotating about each central axis,were calculated respectively.Although they may have little practical value,but the results should have some theoretical value,that is they show a little peculiarity of matter form for electromagnetic fields from an angle of view.