波尔共振实验中值得探讨的两个问题

摘要

Beginning from experimental principle, it calculates the uncertainty of the phase difference, and compare with the theoretical value and the calculated value of the phase difference,and then obtain a result:the maximum difference between the two is 4.2°.Then,it analysis the change regulation of the phase-frequency characteristics of the force vibration,discuss the mistake of the phase-frequency curve of a part of paper,the last ,have a result:the phase difference between amplitude and driving force is gradually decrease with enlarge-ment of driving force frequency.%从实验原理出发，计算相位差的不确定度，并对由公式计算的φ理值与实际测得的φ测值进行比较，发现二者之差最大可达到4.2°。分析了受迫振动相频特性曲线的变化规律，对部分论文中出现错误的相频特性曲线进行讨论，最后得出结论：随着驱动力频率的增大，振幅与驱动力之间的相位差应是逐渐减小的。