This paper, from different angle, diccussed the physics meaning of each quantity inthe faraday electromagnetic induction law, analyxed a typical problem caused byunexact concept and incorrect variable substitution.

• 本文从不同的角度讨论了法拉第电磁感应定律中各量的物理意义，分析了由于物理概念不确切和使用不正确的变量代换而引起的典型问题。