如图所示的电路中电源两端的电压保持不变．闭合开关s将�动变阻器的�片p�右移动下列说法正确的是 A．电压表v1示数不变v2示数变大 Sketch Coloring Page

如图所示的电路中电源两端的电压保持不变．闭合开关s将�动变阻器的�片p�右移动下列说法正确的是 A．电压表v1示数不变v2示数变大 Template

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tomski如图所示的电路中电源两端的电压保持不变．闭合开关s将�动变阻器的�片p�右移动下列说法正确的是 a．电压表v1示数不变v2示数变大 coloring

如图甲所示的电路中 电源电压保持不变 为定值电阻 R为�动变阻器。闭合开关S 移动�片P �动变阻器消耗的电功率出卷� 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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

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

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

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电源电压保持不变闭合开关S将�动变阻器的�片P�b端移动下列说法中正确的是 A电流表A1的示数变小电压 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

如图所示的电路中电源电压保持不变R1为定值电阻R2为�动变阻器．闭合开关S时当�片P在某一端点时电流表示数为01AR2消耗的电 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电源电压保持不变闭合开关S后�动变阻器的�片P由a端移动到b端时测得电阻R两端的电压U与通过电阻R的电流I的变化关系如 sketch template

题目在图a所示电路中电源电压为24伏且保持不变电阻R1的阻值为20欧�动变阻器R2标有“1A 字样电压表V的表盘如图b所示 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

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

如图所示的电路中电源电压保持不变闭台S移动�片使得电压表V1示数与电压表V2示数为12此时电流表小数为I再次移动�片使得电压表 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

一轮复习：描绘小灯泡伏安特性曲线知乎 sketch template

如左图所示的电路中电源电动势为30V内阻不计L1L2L3为3个相同规格小灯泡这种小灯泡的伏安特性曲线如右图所示．当开关S闭合后 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

如图所示的电路中电源两端的电压保持不变．闭合开关S将�动变阻器的�片P�右移动下列说法正确的是 A．电压表V1与电压表V2的示数之和 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．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

如图所示的电路中电源电压保持不变R为定值电阻当开关闭合时标有“6V 3W 的小灯泡L恰好正常�光若保持R不变将L换成另一只标有 sketch template

如图所示的电路中电源两端电压保持不变R1=10ΩR1＜R2R3的变化范围是0 20Ω．当�动变阻器的�片P在a端时电流表的示数为0 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01AR2消耗的电功率为lW 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

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

如图所示电路中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．电流表A示数变大电压表V2示数变小B．电流 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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a端移动到b端时测得电阻R两端的电压U与通过R的电流I的变化关系 sketch template

在如图所示的电路中电源电压保持不变闭合开关S当�动变阻器的�片�右移动时则 A．电压表的示数变大B．电流表的示数变大C．电阻R的功率不 sketch template

在如图所示的电路中电源电压保持不变闭合开关S将�动变阻器�片P�左移动时以下说法正确的是 A．两电流表示数的差值的绝对值变小B sketch template

如图所示的电路中电源两端电压U保持不变．当�动变阻器的�片P置于A端时闭合开关S电压表的示数U1=8V电流表的示数I1=1A当�动 sketch template

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