【Attention】 1.Read the instructions to the instruments before experiment 2.During measurement,the earth point of devices should be connected to each other.. 【Question】 1.During transient process,fix the square wave frequency,change the value of resistance,why the wave pattern changes?Will change of frequency leads to such wave pattern? 2.During RLC transient process,if the frequency of square wave is too high or too low,will the damping oscillation appears?How to obtain time constant of RLC circuit by the wave pattern of damping oscillation? 3.In RC,RL circuits,when the loss resistance of C or L can't be ignored,can we measure the time constant using the former method? 4.Input a simple sinusoidal altemating votage U,withIfRIkCF. calculate UR Uc.IU/U:I and c.Represent it in vector diagram. 5.According to the characteristic of resonant series RLC circuit,how to know whether the circuit reaches resonance? 6.During resonance,what is the relationship between the instantaneous voltage on capacity and inductance?If they are connect to the X and Y axis of oscilloscope,what can we see?Why? 【Reference】 []赵凯华，陈熙谋.电磁学（下册）.北京：人民教育出版社，1980 [2]程守珠，江之永.普通物理学（第五版）.北京：高等教育出版社，1998 [3)谢行怒，康士秀.大学物理实验（第二册）.北京：高等教育出版社，2001 【Appendix】 Introduction to digital storage oscilloscope There are several function areas on the panel.The following are the brief introduction to the control buttons of common use. 1.SCREEN. Many details are displayed in the screen. 2.VERTICAL: (1)CH1 Wave input,magnitude adjustment,vertical positioning,screen menu.10 【Attention】 1．Read the instructions to the instruments before experiment 2．During measurement, the earth point of devices should be connected to each other. ． 【Question】 1. During transient process, fix the square wave frequency, change the value of resistance, why the wave pattern changes? Will change of frequency leads to such wave pattern? 2. During RLC transient process, if the frequency of square wave is too high or too low, will the damping oscillation appears? How to obtain time constant of RLC circuit by the wave pattern of damping oscillation? 3. In RC, RL circuits, when the loss resistance of C or L can’t be ignored, can we measure the time constant using the former method? 4. Input a simple sinusoidal alternating voltage Ui with ω ൌ 1 √RC ൗ .. If R = 1 kΩ，C = 0.5 F, calculate UR、UC、｜UC/ Ui｜and φC. Represent it in vector diagram. 5. According to the characteristic of resonant series RLC circuit, how to know whether the circuit reaches resonance? 6. During resonance, what is the relationship between the instantaneous voltage on capacity and inductance? If they are connect to the X and Y axis of oscilloscope, what can we see? Why? 【Reference】 [1] 赵凯华，陈熙谋．电磁学（下册）．北京：人民教育出版社，1980 [2] 程守珠，江之永．普通物理学（第五版）．北京：高等教育出版社，1998 [3] 谢行怒，康士秀．大学物理实验（第二册）．北京：高等教育出版社，2001 【Appendix】 Introduction to digital storage oscilloscope There are several function areas on the panel. The following are the brief introduction to the control buttons of common use. 1． SCREEN. Many details are displayed in the screen. 2．VERTICAL： （1）CH 1 Wave input, magnitude adjustment, vertical positioning, screen menu