摘要
通过探究做简谐运动的圆柱形磁铁处于线圈不同位置时磁感应强度的变化,理论推导出线圈内磁通量的变化,从而获得了交流的感应电动势.为此设计了由两个弹簧连接磁铁在线圈内做简谐振动而构成的简谐式法拉第电磁感应定律演示仪,由实验得到感应电动势并对其进行分析,与理论计算结果相符合.该仪器能够定量演示变速状态下的法拉第1电磁感应定律,演示效果明显,适合于课堂教学演示.
By exploring the change of magnetic induction intensity when the cylindrical magnet with simple harmonic motion is in different positions of the coil, the change of magnetic foux in the coil is theoretically deduced,and the induced electromotive force is obtained. A harmonic vibration demonstrator of faraday law of induction is designed, which is composed of a magnet which is connected to two springs and does harmonic vibration. The electromotive force of induction through the experiment is analyzed. The result is corresponded with theory. It can demonstrate the faraday law of induction with variable speed quantitatively, and the effect is obvious. It is suitable for classroom demonstration in teaching.
作者
马志春
吴淑花
MA Zhi-chun;WU Shu-hua(School of Mechanical&Electrical Engineering,Shijiazhuang University,Shijiazhuang,Hebei050035,China)
出处
《石家庄学院学报》
2019年第6期123-126,共4页
Journal of Shijiazhuang University
基金
石家庄学院教学改革研究与实践项目(JGXM-201922)
河北省科技计划自筹项目(18214320,18210912)
关键词
简谐振动
磁感应强度
感应电动势
simple harmonic vibration
magnetic induction intensity
electromotive force of induction
