摘要
在金属导电经典微观图像中,自由电子和晶格正离子的碰撞符合泊松流要求的条件,因此碰撞时间间隔服从指数分布.简明地推导出了与微分形式的焦耳-楞次定律自洽的金属电导率表达式.
In the classical microscopic picture of metal conduction,the collision between free electrons and positive ions satisfies three requirements of Poisson flow,thus the time interval between the collisions obeys an exponential distribution.The expression of metallic electric conductivity is concisely given.Hereby the Joule-Lenz law in differential form is derived self-consistently.
出处
《大学物理》
北大核心
2011年第1期29-30,41,共3页
College Physics
关键词
金属电导率
泊松流
metallic electric conductivity
Poisson flow
