| 负载弦之演示教具 |
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| 引用本文： | 周恒,刘源俊.负载弦之演示教具[J].大学物理,2003,22(5):31-33. |
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| 作者姓名： | 周恒 刘源俊 |
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| 作者单位： | 台湾东吴大学,物理系,台湾,台北,111 |
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| 基金项目： | 台湾东吴大学源流物理研究专款资助项目 |
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| 摘 要： | 介绍一自制的负载弦教具，5颗沿铀向充磁的圆柱状钐钴磁铁穿在细钓鱼线上，作为负载弦之负载质点，再以可调频率的交流电磁化马蹄形电磁铁，使得马蹄形电磁铁对圆柱状钐钴磁铁施与周期性的引力及斥力，启动负载弦的各个简正模式．此自制的负载弦教具可定量演示教科书中理论计算的结果．
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| 关 键 词： | 负载弦 教具 马蹄形电磁铁 演示教学 教学研究 振动系统 耦合振动 简正模式 |
| 文章编号： | 1000-0712(2003)05-0031-03 |
| 修稿时间： | 2001年11月15 |
Demonstration of vibration of a loaded string |
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| Chien-Heng Chou,Yuan-Thun Liu.Demonstration of vibration of a loaded string[J].College Physics,2003,22(5):31-33. |
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| Authors: | Chien-Heng Chou Yuan-Thun Liu |
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| Abstract: | A home made instrument for the demonstration of a vibration modes of a loaded string is designed and the process of making such an instrument is described in detail. Five columnar rare-earth magnets, which are magnetized along the direction of axis of the magnet, are loaded on a light string. The vibration modes of the loaded string are excited by an electromagnet. The electromagnet is alternatively magnetized by an AC current, of which the frequency is adjustable. The instrument exhibits quantitatively the vibration modes of the loaded string, which are addressed theoretically in most available books. |
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| Keywords: | loaded string coupled harmonic oscillation normal mode physics demonstration |
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