7．如图4所示电路电源电压恒定不变当s1闭合s2断开时电压表的示数为4v当s1断开s2闭合时电压表的示数为10v则r1∶r2为 Sketch Coloring Page

7．如图4所示电路电源电压恒定不变当s1闭合s2断开时电压表的示数为4v当s1断开s2闭合时电压表的示数为10v则r1∶r2为 Template

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sketch #4566 Edward Scissorhands by Angel Ördoñez

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tomski7．如图4所示电路电源电压恒定不变当s1闭合s2断开时电压表的示数为4v当s1断开s2闭合时电压表的示数为10v则r1∶r2为 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

百度教育 sketch template

27．在图甲所示电路中电源电压3V恒定不变R1=5Ω当�动变阻器R2最大阻值大于R1接入电路的阻值增大时R2消耗的电功率如何变化� 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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

7．如图4所示电路电源电压恒定不变当S1闭合S2断开时电压表的示数为4V当S1断开S2闭合时电压表的示数为10V则R1∶R2为 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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

12．如图所示电路电源电压恒定R0为定值电阻R为�动变阻器．闭合开关S后在�动变阻器�片P�左�动的过程中 A．电流表A1的示数变小 sketch template

题目如图所示电源电压恒定当开关S1S2闭合甲乙两表为相同的电压表接线柱上标有“﹣ “3 “15 两电压表指针偏转相同 sketch template

题目如图甲所示电路电源电压不变小灯泡L的额定功率为0625W乙图是该小灯泡I U图像�动变阻器的最大阻值R为定值电阻R0的三倍 sketch template

如图所示电源电压保持恒定电阻R的阻值与�动变阻器最大阻值之比为23当S1闭合S2断开�动变阻器的�片P在AB的中点时小灯泡所消耗 sketch template

如图1所示的电路中R1为定值电阻R2为�动变阻器电源电压不变．闭合开关S后�片P从a端移动到b端电流表示数I与电压表示数U的变化关系 sketch template

如图所示电路中电源电压恒定Rl为定值电阻R2为�动变阻器．闭合开关S后�动变阻器�片自b�a移动的过程中 A．电压表V2的示数变小 sketch template

如图所示的电路中电源电压保持不变当开关闭合�片由b端�a端移动的过程中以下说法正确的是 A．电压表的示数减小电流表的示数增大B sketch template

如图所示电源电压恒定当开关S1闭合S2断开时电压表的示数为3V当S1断开S2闭合时电压表的示数为45V则灯L2两端电压为1 sketch template

13．如图4所示电源电压和灯泡电阻都保持不变当�动变阻器的�片P由中点�右移动时下列判断不正确的是 A．电流表和电压表的示数都增大 B 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

如图所示电路中电源电压U=45V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

题目如图所示电路中电源电压恒为45V电压表量程为0 3V电流表的量程为0 06A�动变阻器的规格为“35Ω 2A 灯泡铭牌标 sketch template

在如图3所示的电路中电源电压为12V定值电阻R=4Ω�动变阻器R0的最大阻值为6Ω移动�片P的位置使电流增加电流表最大的示数可达 A sketch template

如图所示电路电源电压恒定不变．当S1闭合S2断开时电压表的示数为3V当S1断开S2闭合时电压表的示数9V则R1R2为12 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

小敏用如图甲所示的电路图研究通过导体的电流与导体电阻的关系电源电压恒为6V改变电阻R的阻值调节�动变阻器�片保持R两端的电压不变记 sketch template

如图所示的电路中电源电压U=45V且保持不变电阻R1=5Ω变阻器R2的最大阻值为20Ω电流表量程为0 06A电压表的量程为0 sketch template

如图所示电路电源电压不变R1R2的阻值分别为10Ω和20Ω闭合S1断开S2时 电流表的示数为03A当同时闭合S1S2时 sketch template

如图所示电路电源电压U＝12伏特且保持不变定值电阻的阻值是�动变阻器最大阻值的2倍当�片P在�动过程中电压表的最小示数是 A sketch template

如图甲所示电路，电源电压恒为6V，�动变阻器R的规格为“25Ω、1A”，电流表量程选择“0∼06A”，电压表量程选择“0∼3V”，小灯泡上标 sketch template

如图所示电路电源电压为6V且保持不变定值电阻R1为10Ω�动变阻器R2的规格为“20Ω 05A 电压表量程为0 3V电流表量程为0 sketch template

如图所示电路电源电压为6V电阻R2为10Ω�动变阻器R1的最大阻值是20Ω当�片P移到a端时电压表读数是6V当�片P移到b端时 sketch template

如图所示电路中电源电动势E恒定内阻r＝1 Ω定值电阻R3＝5 Ω．当开关K断开与闭合时ab段电路消耗的电功率相等．设电压表电流表为 sketch template

如图所示电路电源电压不变AB为铅笔芯开关闭合后当�片M在某一位置时电路的总功率为P电流表A1A2的示数分别为I1I2当�片M 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

如图1所示的电路中电源电压不变小灯泡的额定电压为25V图2是该小灯泡I U图象变阻器的最大阻值R为30Ω．闭合开关S当�片P置于某 sketch template

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