如图所示的电路中开关s闭合后电压表vlv2的示数分别为12 V和4 V电阻r2=20Ω求电阻r1的阻值和电流表a的示数分别为多� Sketch Coloring Page

如图所示的电路中开关s闭合后电压表vlv2的示数分别为12 V和4 V电阻r2=20Ω求电阻r1的阻值和电流表a的示数分别为多� Template

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tomski如图所示的电路中开关s闭合后电压表vlv2的示数分别为12 v和4 v电阻r2=20Ω求电阻r1的阻值和电流表a的示数分别为多� coloring

如图2所示电路，当开关S闭合后，L1、L2均能�光，电流表、电压表均有示数．过一会儿，两灯都不�光．电流表、电压表的示数均为零，可能�生的故障 sketch template

如图所示电路中电源电压保持不变在甲图中闭合开关S，电压表示数为4V，电流表示数为04A；百度知道 sketch template

电源、电阻、电流表与开关连接成如图所示的电路。已知电阻R=20Ω，电源的内阻r=10Ω，闭合开关S后，电流表示数I=050A。 sketch template

如图所示电路中，开关S闭合前电路已经处于稳态，在t=0时开关S闭合开关S闭合后的为（）电气工程师题库帮考� 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

在如图所示的电路中开关S闭合时电灯L1和L2是并联的断开开关S电流表的示数不变选填“变大 “变小或“不变 电压表的示数不变 sketch template

题目如右图所示家庭电路中当开关S闭合后灯泡L不亮用试电笔测试cd两点时氖管都�光测试ab两点时只有a点氖管�光则故障可能 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

如图所示的电路中开关S闭合后电压表VlV2的示数分别为12 V和4 V电阻R2=20Ω求电阻R1的阻值和电流表A的示数分别为多� sketch template

在如图1所示的电路中闭合开关S灯L不亮电压表有示数．已知电路中各处均接触良好．1请写出�生上述现象的二个可能原因a．L短路L短路 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

如图所示当开关S闭合后电压表V1 的示数为12V电压表V2的示数为4V那么灯L1两端的电压是 A．12V B．4V C．8VD sketch template

如图所示的电路中若同时闭合开关S1和S3、断开S2电阻R1与R2是 的若只闭合开关S2电阻R1和R2是 的均选填 sketch template

如图所示的电路中开关S闭合后电压表VlV2的示数分别为12 V和4 V电阻R2=20Ω求电阻R1的阻值和电流表A的示数分别为多� sketch template

如图所示的电路中电源的电压保持不变R1为定值电阻R2为�动变阻器闭合开关S�片P�右移动时则A．电流表A的示数变大B．电压表V的示 sketch template

如图a所示的电路中电源电压保持不变闭合开关s后�动变阻器的�片P由B端移动到A端时测得电阻R1两端的电压与通过电阻R1的电流的变化关系 sketch template

在如图所示的电路中电源电压不变．开关S闭合后移动�片P改变�动变阻器接入电路的阻值使电压表的示数从6V变化到2V同时观察到电流表的示 sketch template

在如图1所示电路中当闭合开关后两个电压表指针偏转均为图2所示则电源电压是66V电阻R1两端的电压是4848VR2两端的电压是1 sketch template

如图所示的电路中，电源两端电压保持不变，电阻R2的阻值为20Ω．闭合开关后，电压表的示数为2V，电流表的示数为02A，求：1电阻R1的 sketch template

题目如图甲的电路中电源电压保持不变闭合开关后�片P由b端移到a端电流表示数I与电压表示数U的变化关系如图乙所示则可判断电源电压是 sketch template

如图所示的电路中闭合开关S后比较abcd四处电流大小其中不正确的是 A．Ia＞IbB．Ia=IdC．Ia＞IdD．Id＞Ic sketch template

百度教育 sketch template

题目如图所示的电路中S1闭合S2断开时甲乙是电流表Ⅰ甲I乙=13此电路通电一分钟所产生的热量为Q1当S1S2都闭合时甲 sketch template

如图所示的电路中电源两端的电压保持不变闭合开关SS1当�片P 移至�动变阻器R2的A端时电压表V1的示数为U1电压表V2的示数为 sketch template

如图所示的电路中电源电压不变闭合开关S当�动变阻器的�片P从A�B�动时下列说法正确的是 A．电压表V1的示数变大B．电压表V2的 sketch template

如图甲所示的电路中电源电压恒定不变R2=30Ω通过R1的电流随它两端电压变化关系如图乙所示则下列计算正确的是A．R1的阻值大小是 sketch template

小明按右图所示的电路进行实验开关闭合后电压表V1和V2的指针位置完全一样如图乙所示L1和L2两端的电压分别是A10V2VB8V 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

人教版物理九年级上第十七章第二节细化知识点同步练习——欧姆定律的图像问题（1）在线组卷 sketch template

27．如图所示的电路电源电压和灯丝电阻保持不变开关S闭合后在�动变阻器�片�左�动过程中电压表V的示数 电流表A1的示数 电流表 sketch template

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

如图所示电路中电源电压不变R1为定值电阻R2为�动变阻器．闭合开关S当�片P在某一端点时电流表示数为01AR2消耗的电功率为lW sketch template

6．图2所示的电路中当闭合开关S后电压表的示数 表示 A．L1两端的电压 B．L2两端的电压 C．电源电压 D．L2和电源电压——青 sketch template

如图所示的电路中开关S闭合后电压表VV1V2的示数分别是UU1U2要计算通过R2的电流I2下列不正确的算式是AI2=BI2 sketch template

在如图所示的电路中电源电压为12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“20Ω 1A 字样．闭合电键S电压表示数为 sketch template

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