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单词 Poynting Theorem
释义

Poynting Theorem

中文百科

坡印亭定理 Poynting's theorem

(重定向自Poynting Theorem)

在电磁学中,坡印亭定理(或称坡印廷定理)是用偏微分方程陈述的关于电磁场的能量守恒的定理,由英国物理学家约翰·坡印亭(John Poynting)发现。坡印亭定理类似于经典力学中的动能定理,在数学形式上与连续性方程相似。它把能量密度u的时间导数,与能量的流动,以及与电磁场做功的速率联系起来。

英语百科

Poynting's theorem 坡印亭定理

(重定向自Poynting Theorem)

In electrodynamics, Poynting's theorem is a statement of conservation of energy for the electromagnetic field, in the form of a partial differential equation, due to the British physicist John Henry Poynting. Poynting's theorem is analogous to the work-energy theorem in classical mechanics, and mathematically similar to the continuity equation, because it relates the energy stored in the electromagnetic field to the work done on a charge distribution (i.e. an electrically charged object), through energy flux.

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更新时间:2025/6/18 5:04:00