电偶极子和磁偶极子在外场中受力和力矩公式的一种简明推导  

A simplified deduction of the force and torque for an dipole in external electromagnetic field

作　　者：徐媛[1] 徐建军[2] 林志方[2] 

机构地区：[1]楚雄师范学院物理系,云南楚雄675000 [2]复旦大学物理系,上海200433

出　　处：《大学物理》2006年第10期39-40,共2页College Physics

摘　　要：利用电偶极子的电荷密度和磁偶极子的电流密度的表达式,并借助δ函数导出了电偶极子和磁偶极子在外场中所受的力和力矩公式.In terms the expressions of the charge density for an electric dipole, the force and torque exerted by an external electric field on it are derived in a simple way by using the δ function. The same thing is also done for an magnetic dipole in external magnetic field.

关 键 词：电偶极子 磁偶极子 电荷密度 电流密度 力 力矩 Δ函数 

分 类 号：O441[理学—电磁学]