摘要
依照电动力学有关电磁辐射的基本理论,在满足远场近似条件并在非相对论情形和准周期平均意义下,依据辐射过程的功能原理与能量守恒的法则,推导了旋转带电刚体的电偶极矩辐射的功率与阻尼力矩;所得公式在单个电偶极子情形的结论与已有文献的结论相符;枚举数例并列表计算了若干常见带电体的相关结果。
Based on the basic theory of electrodynamics about electromagnetic radiation,under the conditions of far field,non-relativistic and quasi-periodic approximation,the general formulae of electric-dipole radiation power and damping torque of a steadily and uniformly charged rigid body with any periodic rotation are derived and discussed.The results of several common symmetric charged bodies are listed in a table.
作者
周国全
霍彦聪
ZHOU Guoquan;HUO Yancong(School of Physics and Technology,Wuhan University,Hubei,Wuhan 430072)
出处
《物理与工程》
2021年第5期88-92,共5页
Physics and Engineering
关键词
电磁辐射
电偶极矩
阻尼力矩
阻尼
转动
EM radiation
electric-dipole moment
damping torque
damping
rotation
