摘要
介绍一种利用电磁感应原理得到可调的谐振信号,驱动扬声器产生稳定的谐振动,使振动在特制的弹簧中形成驻波,研制出了便于教师携带的、适合学生们自制、可在普通课堂上演示的纵驻波实验仪器.
This paper introduced a kind of experiment demonstrator,by which an adjustable harmonic signal can be obtained by electromagnetic induction principle.The stable harmonic resonance can be produced by a driving loudspeaker and form standing wave in the tailor-made spring.This apparatus can demonstrate the experiment of longitudinal standing wave in ordinary class,which is portable for teachers and suitable for students to make by themselves.
出处
《物理与工程》
2010年第5期24-25,51,共3页
Physics and Engineering
基金
黑龙江省教育厅2007年科学技术研究面上项目(11521309)
关键词
实验仪器
纵驻波
便携式
弹簧
experiment apparatus
longitudinal standing wave
portable
spring
