摘要
利用稀土永磁材料钕铁硼 (Nd-Fe -B)设计制作出一种新型电磁阻尼演示仪 ,可演示阻尼振动的三种状态 (欠阻尼状态、临界阻尼状态、过阻尼状态 ) ,配合投影仪使用 ,演示效果更显著 .
A new instrument for demonstrating electromagnetic damping is developed by Nd-Fe-B magnet material, displaying three damped vibration states (underdamping state、criticaldamping state and overdamping state). Using a projector, the demonstration effects is more obvious.
出处
《大学物理》
2000年第8期36-37,共2页
College Physics
