R取值对测量并联谐振频率的影响  

The Effect of the Value of R on Measuring Parallel Resonant Frequencies

作　　者：张月洋[1] 王丽[1] 

机构地区：[1]吉林师范大学,吉林四平136000

出　　处：《大学物理实验》2011年第6期39-40,共2页Physical Experiment of College

摘　　要：采用测量电容两端电压最大值的方法来确定RLC并联谐振的谐振频率。发现在RLC电路中,电阻R值愈小,η(η=f实验/f理论)愈接近于1;并且当电阻取值一定时,电容C取值越小,测量越准确。最后给出了简化电路图,即R=0,此时R′=RL。The work adopted the means of measurement of the maximum value across the capacitance to determine the resonance frequency of RLC Parallel Resonance.In this circuit,we find that when the value of resistance R is enough small,η would have a value of more close to 1.Fixed the value of R,the capacitance is smaller,the measuring is more accurate.At last,we give a simplified circuit diagram for RLC Parallel Resonance.Namely R=0 and R′=RL at this time.

关 键 词：RLC并联电路 谐振频率 品质因数 

分 类 号：O4-34[理学—物理]