6．如图所示的电路当可变电阻r的阻值增大时下列说法正确的是 A．ab两点间的电压u增大 B．ab两点间的电压u减小 c．通过r的电流 Sketch Coloring Page

6．如图所示的电路当可变电阻r的阻值增大时下列说法正确的是 A．ab两点间的电压u增大 B．ab两点间的电压u减小 c．通过r的电流 Template

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tomski6．如图所示的电路当可变电阻r的阻值增大时下列说法正确的是 a．ab两点间的电压u增大 b．ab两点间的电压u减小 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甲所示电路可变电阻R2的�片P从左�右�动过程中电压表与电流表的示数�图乙所示的规律．则可变电阻R2接入电路的阻值变化范围是 电源 sketch template

6．如图所示的电路当可变电阻R的阻值增大时下列说法正确的是 A．AB两点间的电压U增大 B．AB两点间的电压U减小 C．通过R的电流 sketch template

如图所示可变电阻R 0 标有“150Ω3A 负载电阻R有 “50Ω 2A 当输入电压UAB=200V时为了保证各电阻均不损坏�片上下 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

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

5．在如图所示的电路中R1R2R3和R4皆为定值电阻R5为可变电阻电源的电动势为E内阻为r设电流表A的读数为I电压表V的读数为 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

如图所示的电路中当可变电阻R的值增大时 Aab两点间的电压增大 Bab两点间的电压减小C通过电阻R1的电流增大 D通过电阻R2的 sketch template

6．如图所示图甲为热敏电阻的Rt图象图乙为用此热敏电阻R和继电器组成的一个简单恒温箱温控电路继电器的电阻为100 Ω当线圈的电流大于 sketch template

如图所示电阻R两端的电压U随通过该电阻的电流I的变化曲线如图所示电源电动势为70 VR1＝1000 Ω．现调节可变电阻R2的阻值使 sketch template

如图甲所示的电路图中电源电压为12V电阻R1的I U图象如图乙所示．当闭合开关�动变阻器R接入电路的阻值为40Ω时则下列选项正确的是 sketch template

在如图所示的电路中，电源电压保持不变，定值电阻R1的阻值为10Ω，�动变阻器R2上标有“2A”字样。闭合开关S，移动�片P至电路中的电流最大 sketch template

题目如图所示的电路中电源电压为 6V且保持不变�动变阻器 R 的规格为“40Ω 1A 定值电阻 R1的规格为“10Ω 05A 只 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

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 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R1R2产生的热量之比为 A sketch template

6．如图所示的电路当可变电阻R的阻值增大时下列说法正确的是 A．AB两点间的电压U增大 B．AB两点间的电压U减小 C．通过R的电流 sketch template

如右图所示电路中电源电压保持不变闭合开关S后将�动变阻器R2的�片P�右移动在此过程中 A．电压表V1示数不变电压表V2示数变大B sketch template

如图甲所示的电路在�动变阻器R2的�片P从B�A�动的过程中电压表与电流表示数的变化关系如图乙所示则下列说法中正确的是 A．当电流表 sketch template

阻值相等的三个电阻R和R1R2R3组成如图所示的电路且R1=R2=R3若电阻R1两端的电压为20伏电阻R3两端的电压为4伏则电阻 sketch template

8．在如图甲所示的电路中电阻R的阻值为50Ω在ab间加上图乙所示的正弦交流电则下面说法中正确的是 A．交流电压的有效值为100V sketch template

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 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

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 sketch template

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 sketch template

如图所示的电路中AB两点间的电压是6V电阻R1=15ΩR2=5Ω 求电路的总电阻R和总电流I是多�——青夏教育精英家教�—— sketch template

在如图所示的电路中电阻R1=10ΩR2=20Ω电源电压保持不变当开关S1S3断开S2闭合时电流表的示数为04A电源电压为 sketch template

如图甲所示的电路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的过程中电压表和电流表的示数变化情况如图乙 sketch template

12．在如图所示的电路中电源电压恒定为U电键闭合后将�动变阻器R2的�片P�左�动时电路中的小灯泡L1L 2和L 3的亮度变化情况是 sketch template

如图所示的电路中电源电压保持不变．当�动变阻器的�片P�右�动时 电流表和电压表的示数变化情况是 A．电流表和电压表的示数都变大 sketch template

在图A所示的电路中电源电压为6伏且保持不变电阻R1的阻值为15欧闭合电键S电流表的示数如图B所示求 1通过电阻R1的 sketch template

如图所示的电路中电源的电动势为E内阻为r．当可变电阻的�片P�b移动时电压表V1的读数U1与电压表V2的读数U2的变化情况是AU1变大 sketch template

如图所示的电路中，电源电压保持不变。闭合开关S后，�片P从b端移动到a端的过程，电压表示数U与电流表示数I的关系图像如图所示。下列说法正确的是（ sketch template

如图a所示电阻R1的阻值为30欧当只闭合电键S1电流表的指针位置如图b所示电流表换用另一量程后再闭合电键S1S2后电流表 sketch template

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