如图所示r1r2阻值分别为30Ω和50Ω已知通过r1的电流为03a求1电路的总电阻是多�2r1两端的电压是多�3 Sketch Coloring Page

如图所示r1r2阻值分别为30Ω和50Ω已知通过r1的电流为03a求1电路的总电阻是多�2r1两端的电压是多�3 Template

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tomski如图所示r1r2阻值分别为30Ω和50Ω已知通过r1的电流为03a求1电路的总电阻是多�2r1两端的电压是多�3 coloring

如图所示，电源电压恒为18V，定值电阻R1=20Ω，�动变阻器R2标有“40Ω 05A”，电流表A的量程为006A，电压表量程为0 sketch template

如图所示的电路图是用来研究通过导体的电流跟导体电阻关系的，其中R1与R2为阻值不同的定值电阻，第一次实验用的定值电阻为R1 ，闭合开关后，记 sketch template

百度教育 sketch template

两个定值电阻R1、R2并联在电路中如图甲所示它们的电流与其两端的电压关系如图乙所示闭合开关S则R1R2产生的热量之比为 A sketch template

题目如图甲所示是电阻R1R2的U﹣I图象小枫利用R1R2两个电阻设计了如图乙所示的实验电路闭合开关电流表示数为04A则下列 sketch template

如图甲所示是某兴趣小组在“伏安法测电阻 实验中分别作出R1R2的U I图象．小明利用R1R2两个电阻设计了如图乙所示的实验电路此时 sketch template

如图2所示电路图中定值电阻和�动变阻器R串联两端的电压分别为当�动变阻器的�片P�右�动过程中 A 变小也变小 B 变小不变 sketch template

如图所示电源两端的电压保持不变电阻R1与R2的阻值均为30Ω．闭合开关S电压表V1和V2的示数之比为65若将电压表V1和V2分别换成 sketch template

小明和同学一起用如图所示的电路探究“电流与电阻的关系”，电源为两节新干电池，实验室提供了阻值分别为25Ω、20Ω、15Ω、10Ω、5Ω的电阻各 sketch template

2．如图甲所示电阻R的阻值为50Ω在ab间加上图乙所示的正弦交流电交流电表内阻不计则下面说法中正确的是 A．电阻R的功率为 sketch template

如图所示的电路中已知电源电动势E=36V内电阻r=4ΩR1=30Ω每盏灯额定功率都是2W额定电压也相同．当K闭合将电阻箱R2调到R2 sketch template

“探究电流与电阻关系”的实验实物图如图甲所示，定值电阻的阻值分别为5Ω、10Ω、15Ω、20Ω。（1）连接电路时�现，电路中有一根导线连接错误 sketch template

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如图所示电路中R1R2串联电源电压为4VR2=12Ω．S闭合时电流表的读数为025A．求1R1R2串联的总电阻2R1的 sketch template

在如图所示的电路中电源电压为12伏且保持不变电阻R1的阻值为10欧�动变阻器R2上标有“50Ω 2� 字样．闭合电键S后电路中的电流为 sketch template

如图甲所示是小明“探究电流与电压、电阻的关系”的实验电路图。选用的实验器材是：电源3V、电流表（00 6A）、出卷� sketch template

小红用如图甲所示的实验电路“探究电流与电阻的关系”，实验中所用定值电阻的阻值分别为各一个。（1）电路图中�动变阻器的作用是和控制定值电阻两端 sketch template

如图所示的电路中电源电压保持不变R1=30ΩR2=20Ω电流表的示数为02A则R1R2串联后的总电阻为5050Ω电源电压为 sketch template

百度教育 sketch template

串联电路、并联电路电流、电压、电阻之间的关系知乎 sketch template

如图所示的是通过某两个电阻R1R2的电流随电压变化的图象从中可知电阻R2的阻值为 Ω从图象可知电阻R1 R2填“大于 “等于或 sketch template

在如图甲所示的电路中R0为定值电阻R为�动变阻器电源电压不变闭合开关S后调节�片P从a端移动到b端过程中电流表示数I与电压表示数U sketch template

小明利用如图甲所示的电路探究电流跟电阻的关系已知电源电压为6V且保持不变实验用到的电阻阻值分别为5Ω10Ω15Ω20Ω25Ω1 sketch template

小明利用如图甲所示的电路探究电流跟电阻的关系已知电源电压为6V且保持不变实验用到的电阻阻值分别为5Ω10Ω15Ω20Ω25Ω�请 sketch template

在如图a所示的电路中电源电压为6伏且保持不变定值电阻R1的阻值为20欧�动变阻器R2上标有“50Ω 2A 字样．闭合电键S移动 sketch template

如图所示R1=5ΩR2=6Ω电压表与电流表的量程分别为0 10V和0 3A．电表均为理想电表．导体棒ab与导轨电阻均不计且导轨光� sketch template

如图2所示的电路中电源电压不变开关闭合后若�动变阻器的�片P�右端移动则 A电压表的示数和电流表的示数都增大 B电压表的示数和电流 sketch template

韩勇同学设计了如图所示的电路用来测量电阻R1的阻值．他将开关分别与ab接触时电流表的示数之比为5∶2已知R2＝6 Ω求R1的阻值是 sketch template

如图所示电路中电源电压U=45V且保持不变定值电阻R1=5Ω变阻器R2最大电阻为20Ω电流表量程为0 06A电压表量程为0 sketch template

如图所示电路电源电压为45VR1阻值为5Ω�动变阻器R2最大阻值为20Ω电流表量程为0 06A电压表量程为0 3V．求1 sketch template

如图所示为分别测量小灯泡L和定值电阻R后得到的I U关系图线．由图可知随着电压的升高L的阻值逐渐变 R的阻值为 Ω．题目和参考答案 sketch template

在如图所示的电路中电源电压保持不变电阻R1 的阻值为20Ω闭合开关S电流表A1的示数为03A电流表A 的示数为05A．求1 sketch template

如图甲电路中电源电压不变R1为定值电阻闭合开关S将�动变阻器R2的�片P从a�b移动过程中电压表和电流表的示数变化情况如图乙 sketch template

如图所示的电路中R0为定值电阻R为�动变阻器．当�动变阻器两端电压为4V时通过的电流为02A此时�动变阻器接入电路的阻值是多大改变 sketch template

如图所示R0为定值电阻R为�动变阻器当变阻器�片P�到M点时电压表读数为9伏当变阻器�片P�到N点时变阻器连入电路的阻值为�片P� sketch template

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