| 利用强迫振动扭摆方法测灵敏电流计临界外电阻 |
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| 引用本文： | 王爱军,孙为,张国林.利用强迫振动扭摆方法测灵敏电流计临界外电阻[J].物理实验,2001,21(4):8-10. |
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| 作者姓名： | 王爱军 孙为 张国林 |
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| 作者单位： | 石油大学基础系物理教研室,北京,昌平,102200 |
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| 摘 要： | 把灵敏电流计的张丝及线圈作为扭摆，用正弦讯号发生器作驱动源，扭摆在驱动电流的作用下做受迫振动．利用扭摆作稳态受迫振动的共振频率公式以及电流计全临界电阻与电流计结构参量的关系推导出测量灵敏电流计临界外电阻的公式．
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| 关 键 词： | 灵敏电流计 临界外电阻 强迫振动扭摆法 共振频率 电阻测量 固有频率 物理实验 结构参量 |
Measurement of external critical resistance of a galvanometer with forced vibration torsional pendulum method |
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| WANG Ai,jun,SUN Wei,ZHANG Guo,lin.Measurement of external critical resistance of a galvanometer with forced vibration torsional pendulum method[J].Physics Experimentation,2001,21(4):8-10. |
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| Authors: | WANG Ai jun SUN Wei ZHANG Guo lin |
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| Abstract: | A torsion pendulum which consists of hanging spring and coil for a galvanometer,can do forced vibration driven by sinusoidal current.Using the resonant frequency formula and relationship between total critical resistance and structure parameter for galvanometer,a formula of measuring external critical resistance for galvanometer is derived. |
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| Keywords: | galvanometer external critical resistance resonant frequency |
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