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一、实验发现小华在做串联电路实验时,偶然发现了一个现象:如图1:图1中电路中分别接入5Ω和10Ω的电阻,闭合开关,使用电压表分别测得R_1两端电压U_1和R_2两端电压U_2,他发现U_1与U_2的比值为1∶2,而此时的电阻R_1与R_2的比值也是1∶2,这是巧合吗?于是他将接入10Ω和15Ω的电阻接入电路,使用电压表分别测得R_1两端电压U_1和R_2两端电压
First, the experiment found that when Xiaohua doing serial circuit experiments, accidentally found a phenomenon: Figure 1: Figure 1, respectively, the circuit access 5Ω and 10Ω resistor, the switch is closed, the voltage meter were measured across the voltage R_1 U_1 and R_2 voltage across U_2, he found U_1 and U_2 ratio of 1: 2, and this time the ratio of resistance R_1 and R_2 is 1: 2, is it coincidental? So he will access 10Ω and 15Ω resistor Access circuit, the use of voltmeter were measured across the voltage R_1 R_1 and U_2 voltage across