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1、感生电动势

2、 麦克斯韦假设：

1） 此式反映变化磁场和感生电场的相互关系， 即感生电场是由变化的磁场产生的。

2） S是以 L为边界的任一曲面。

3）

4）

2. 感生电场与静电场的区别

3、感生电场的计算

(1) 只要有变化磁场，整个空间

(2)求感生电场分布是一个复杂问题，只要求本题

1.由电动势定义求（ 已知或易求 ）

2.由法拉第电磁感应定律

5.感生电动势的计算

× × × × ×

× × × × × × ×

× × × × × × ×

× × × × × × ×

× × × × ×

（D点电势高）

C→D

(1) 由电动势定义求解（上式）

(2) 由实验定律求解（法拉第，楞次）

—用实验定律求解

1、冶炼难熔金属及特种合金

2、家用 如：电磁灶

3、电磁阻尼

1、选择高阻值材料

2、多片铁芯组合