稳恒电流与动量守恒定律  

Steady Invariable Circuit and Momentum Conservation Theory

作　　者：岳筱萍[1] 张家平[2] YUE Xiao-ping~1,ZHANG Jia-ping~2 (1. Physics Research Department, Xinxiang Medical College, Xinxiang 453000,China; 2. Physics Department of Xinxiang Teachers College,Xinxiang 453000,China)

机构地区：[1]新乡医学院物理教研室,河南新乡453000 [2]新乡师范高等专科学校物理系,河南新乡453000

出　　处：《新乡师范高等专科学校学报》2004年第2期6-7,共2页Journal of Xinxiang Teachers College

摘　　要：用经典物理学的方法研究了稳恒电流的动量守恒问题和交流电流的动量不守恒的问题。分析了稳恒电流电路的能量转换问题和受力问题，对于稳恒电流电路来说，虽然有电热和磁能的损失，即有能量转换问题，但由于构成稳恒电路的稳恒电源、导体和载流子构成了同一个系统，他们之间的相互作用力属于内力，这样的系统不受其他的外力作用，因此，满足动量守恒定律要求的条件，从而稳恒电流的动量是守恒的；而交流电流则不然，交流电源总是在变化的外力的作用下对电路中的载流子做功的，因此，由电源、构成电路的导体和载流子构成的系统所受的合外力并不为零，这样的系统不满足动量守恒定律要求的条件，从而交流电的动量是不守恒的。Using classical physical method to research the problem of momentum conservation of steady circuit and problem of interfluent circuit's momentum isn't conservation. Analyze the problem of energy transform and force of steady circuit. For steady circuit, although there is loss of electrical heat and magnetic energy, that is the problem of energy transform, but because the power supply, conductor, and carrier form a whole system, the power among them belongs to inner power, this system usn't be forced by exterior power, therefore, it satisfies the conditions of the momentum conservation theory, so the steady circuit's momentum is conservation; but interfluent circuit isn't this case, the power supply of interfluent circuit often acts on the carriers under the changeable exterior power so the altogether exterior power of the power supply, conductor, carrier is not aught, system like that doesn't satisfy the conditions of momentum conservation theory, so interfluent circuit's momentum is not conservation.

关 键 词：稳恒电流 动量守恒定律 稳恒电流动量守恒 

分 类 号：O411.1[理学—理论物理;理学—物理]