电磁感应原理在电磁炉上的应用 毕业论文

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1、电磁感应在电磁炉上的应用摘要：随着科学技术的发展，电磁感应的应用越来越来广泛，也更加贴近生活，所以很好地了解它、掌握并运用它，会使我们的科技发展水平更快速发展起来。同时，激发学生学习物理的兴趣，更深刻的体会到物理来源于生活，并活用于生活。本文主要介绍了电磁感应的原理及其在家电中的应用之一—电磁炉的结构、工作原理、优缺点。关键词：电磁感应，电磁炉，应用III目录前言···································································11.电磁感应·

2、····························································11.1电磁感应现象······················································11.2定律······························································22.电磁感应原理的应用—电磁炉···········································32.1电磁炉

3、发热原理·····················································32.1.1电磁炉发展史···················································32.2电磁炉结构·························································32.2.1电磁炉的组成部件················································32.3III电磁炉

4、的使用注意事项···············································42.4优点·······························································52.5缺点·······························································63.总结·····························································

5、·····6参考文献·······························································7致谢词·································································8III前言物理的世界可以说是起源于人类生产和生活，即物理是与人类生活最为密切的科学。而现在如何学习、了解并掌握这些物理知识，以更好的运用它为人类服务成为一门重要的学问了，也成为了一名物理教师不可推卸的责任。而电磁感应在物理学中的应

6、用广泛，了解这一知识，对学习其他的电磁知识相当于打开了一扇大门的钥匙。本文主要介绍了电磁感应的原理跟其应用——电磁炉，希望可以帮助学生更好地理解电磁感应。1电磁感应电磁感应电磁感应（Electromagneticinduction），是指放在变化磁通量中的导体，会产生电动势。此电动势称为感应电动势或感生电动势，若将此导体闭合成一回路，则该电动势会驱使电子流动，形成感应电流（感生电流）。迈克尔·法拉第是一般被认定为于1831年发现了感应现象的人，虽然FrancescoZantedeschi（英语：Francesc

7、oZantedeschi）在1829年的工作可能对此有所预见。法拉第发现产生在闭合回路上的电动势和通过任何该路径所包围的曲面的磁通量的变化率成正比，这意味着，当通过导体所包围的曲面的磁通量变化时，电流会在任何闭合导体内流动。这适用于当磁场本身变化时或者导体运动于磁场时。电磁感应不仅揭示了电与磁之间的内在联系，而且为电与磁之间的相互转化奠定了实验基础，为人类获取巨大而廉价的电能开辟了道路，在实用上有重大意义。1.1电磁感应现象(1)电磁感应现象：闭合电路中的一部分导体在磁场中做切割磁感线运动。(2)感应电流：在电

8、磁感应现象中导体产生的电流。(3)产生电磁感应现象的条件：只要穿过闭合电路的磁通量发生变化，闭合电路中就有电流产生。即条件为：a．闭合电路中的一部分导体与磁场发生相对运动；b．做切割磁感线运动，穿过闭合电路的磁场发生变化。两种情况产生感应电流的根本原因不同，闭合电路中的一部分导体与磁场发生相对运动时，是导体中的自由电子随导体一起运动，受到的洛伦兹力的一个分力使自由电子发生定向移动形成电