如图所示的电路变阻器r连入电路的电阻值可以在0 100欧姆的范围内变化若r0=10欧姆那么在变阻器�片�动过程中伏特表读数的最小值是 Sketch Coloring Page

如图所示的电路变阻器r连入电路的电阻值可以在0 100欧姆的范围内变化若r0=10欧姆那么在变阻器�片�动过程中伏特表读数的最小值是 Template

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tomski如图所示的电路变阻器r连入电路的电阻值可以在0 100欧姆的范围内变化若r0=10欧姆那么在变阻器�片�动过程中伏特表读数的最小值是 coloring

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，电源电压恒为18V，定值电阻R1=20Ω，�动变阻器R2标有“40Ω 05A”，电流表A的量程为006A，电压表量程为0 sketch template

在图中所示的电路中电源电压保持不变其中定值电阻R1的阻值为R�动变阻器R2的最大阻值为2R闭合电键S当�动变阻器的�片P从中点�右 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

．图10的图a图b中电源电压恒定数值为E电路中�动变阻器总电阻为R图中的定值电阻阻值也为R求两电路里�片P从a�b�动过程中电流表中 sketch template

某实验小组用如图甲所示的电路进行实验R为�动变阻器R0为定值电阻电源电压恒定不变．在�片P�动过程中电压表与电流表的示数变化如图乙所示 sketch template

如图所示的电路变阻器R连入电路的电阻值可以在0 100欧姆的范围内变化若R0=10欧姆那么在变阻器�片�动过程中伏特表读数的最小值是 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

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02A此时�动变阻器接入电路的阻值是多大改变 sketch template

图甲所示电路R为�动变阻器R0为定值电阻电源电压不变改变R的�片位置电压表示数与电流表示数变化的图线如图乙所示根据以上条件可知R0 sketch template

如图甲所示R1为�动变阻器R0R2为定值电阻电源电压U保持不变．建立直角坐标系横轴表示电流纵轴表示电压．改变�动变阻器�片P的位置 sketch template

如图所示一定值电阻R0与最大阻值为40Ω的�动变阻器串联在电路中闭合开关S当�动变阻器的�片P�到最左端时电流表的示数为03A当 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

如图所示变阻器R为“40Ω 3A R1=20Ω当S断开�片P在中点时此时�动变阻器连人电路中的电阻为该�动变阻器最大阻值的1/2 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

一个电源和一个�动变阻器接成如左图所示的电路�动变阻器的最大阻值R0＝22Ω电源路端电压U随外电阻R的变化规律如右图所示．试求1电源 sketch template

如图所示R2为0 50Ω的变阻器合上开关后V1的示数为6VA表的示数为2AA1的示数为05A则变阻器R2连入电路部分的阻值是 sketch template

高中物理《直流电路的动态分析问题》知乎 sketch template

如图所示电路电源电压保持不变．闭合开关S当�动变阻器的�片P从a端�到b端的过程中两个电阻的U I关系图象如图所示．则下列判断正确的是 sketch template

如图所示电路中定值电阻R=5ΩR1为�动变阻器电源电压保持不变．当�片P在变阻器最左端时电流表示数为12A当�片P在变阻器最右端时 sketch template

如图所示电路R1为变阻器R2为定值电阻r为电源内阻且r＞R2．若R1上的电功率为P1R2上的电功率为P2．以下叙述中正确的是 A sketch template

如图所示电源电压不变�动变阻器上标有“50Ω 1A 的字样电阻R1的阻值为10Ω当开关S闭合后�动变阻器的�片置于最左端时电流表的 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电源电压恒定R1为定值电阻R2为�动变阻器．开关S闭合后�动变阻器的�片P在ab之间�动的过程中电压表的示数最大为 sketch template

在如图所示的电路中当�动变阻器R的�动片P�下移动时以下判断中正确的是 A电源内部�热功率变小 B小电珠L变亮 C电流表上读数 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

如图所示电路中�动变阻器的阻值变化范围是0 20欧电源电压为45伏．当电流表的示数是05A时电压表的示数是2V．已知电流表的量程是0 sketch template

如图a所示的电路电源电压保持不变．闭合开关S调节�动变阻器两电压表的示数随电路中电流变化的图象如图b所示根据图象的信息可知 是电压 sketch template

如图所示电源电压为6VR1=12ΩR2为0﹣20Ω的�动变阻器A的量程为3A合上S．求 �A最小示数�为保证A的安全变阻器接入 sketch template

如图10所示的电路中电源电压不变闭合开关S电路正常工作过了一会儿两电表的示数都变大则该电路中出现的故障可能是 A灯泡L开路 sketch template

如图所示电路中R为定值电阻．闭合开关后当�片P在某两点之间�动时电流表的示数变化范围是05 15A电压表的示数变化范围是3 6V 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电源电压为6V且不变．电阻R1的阻值为10Ω�动变阻器R2上标有“50Ω 2A 字样．闭合开关S电流表示数为02A 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甲所示的电路中�动变阻器的�片P从a端移到b端定值电阻R1两端的电压随�动变阻器R2阻值变化的图象如图乙所示下列说法中正确的是 sketch template

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