静电场模拟描迹实验的误差分析和仪器改进  

Systematic Error and Instrument Improvement in Electrostatic Field Experiment

作　　者：程方锐[1] 吕砚荻[1] 张瑞杰[1] 王静[1] 董爱国[1] 王亚芳[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《大学物理实验》2012年第3期103-106,共4页Physical Experiment of College

基　　金：中国地质大学开放基金项目资助

摘　　要：静电场模拟描迹实验是大学物理实验中非常典型的一个实验,在该实验中,误差的主要来源有探针的不同步,导电介质的导电性,电压表内阻等。本文通过描绘同轴圆柱电极板的等势线分布图,定量的研究了以上几种误差来源对实验结果的影响,找出了最佳的实验条件,并对实验仪器进行了改进,大大降低了实验的误差。The electrostatic field experiment is one of the typical experiments. The main sources of the systematic errors in this experiment are from the in-synchronization between two probe needles, the conductivity of the conductive medium and the resistance of the voltmeter. The paper here present a research on how the above errors influence the results by probing the equipotent line maps of the coax- ial cylindrical electrode plate. The best experiment conditions were recommended. Meanwhile, the in- synchronization of two needles is eliminated by improving the probe system and the systematic error was reduced greatly.

关 键 词：导电介质 电压表内阻 静电场 探针改进 

分 类 号：O44[理学—电磁学]