如图所示电路中电源电压为3伏灯泡l1l2阻值分别为12欧和3欧甲乙两处可分别接入电流表或电压表则下列说法中正确的是 A．断开 Sketch Coloring Page

如图所示电路中电源电压为3伏灯泡l1l2阻值分别为12欧和3欧甲乙两处可分别接入电流表或电压表则下列说法中正确的是 A．断开 Template

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tomski如图所示电路中电源电压为3伏灯泡l1l2阻值分别为12欧和3欧甲乙两处可分别接入电流表或电压表则下列说法中正确的是 a．断开 coloring

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

百度教育 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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

题目如图所示电路中电源电压恒为 6V�动变阻器上标有“50Ω 15A 字样将�片 P 移到最右端闭合开关 S1 和 S2读出 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

第一讲 电路的基本概念和基本定律 sketch template

如图甲所示的电路中电源电动势为30V内阻不计L1L2L3为3个特殊材料制成的相同规格小灯泡这种小灯泡的伏安特性曲线如图乙所示．当 sketch template

如图所示电路中电源电压恒为12V电流表A1A2的量程分别为06A3A�动变阻器R2标有“2A 50Ω 字样将�动变阻器�片P调到 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

题目如图甲所示电路中电源电压可调灯L1L2的额定电压均为6VL1L2的I U关系图象如图乙所示闭合开关S逐步调大电源电压至 sketch template

如图所示电路中电源电压为3伏灯泡L1L2阻值分别为12欧和3欧甲乙两处可分别接入电流表或电压表则下列说法中正确的是 A．断开 sketch template

题目如图所示电源电压为6V小灯泡标有“4V 16W 的字样定值电阻R=20Ω不考�温度对灯丝电阻的影响�动变阻器上标有“0 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

一轮复习：描绘小灯泡伏安特性曲线知乎 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电路中电源电压可调小灯泡L1小有“6V 6W 的字样小灯泡L2L3标有“6V 12W 的字样．假设小灯泡电阻不变1闭合 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电压U保持不变电流表的示数为1A如果R1与R2的等效电阻为R并且R1R=53电阻R2消耗的电功率为24W则电阻 sketch template

如图所示电路中电源电压保持12伏L1L2L3的电阻分别为4Ω6Ω8Ω求 �S1S2都断开时电流表和电压表的示数 �S1 sketch template

如图所示电路中电源电压为3伏灯泡L1L2阻值分别为12欧和3欧甲乙两处可分别接入电流表或电压表则下列说法中正确的是 A．断开 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

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灯泡L1L2上分别标有“6V 3W “6V 9W 的字样两灯泡的电阻电源电压均保持不变．当开关S1闭合S2拔至a时 sketch template

如图所示的两个电路中电源电压保持不变闭合开关S当�动变阻器的�片P都�右移动时灯泡LlL2的亮度变化是A．LlL2都变亮B．L1 sketch template

如图所示的电路中电源电压为3V闭合开关后三个电流表A1A2A示数分别为I1I2I已知I=06AI1=04A则通过灯L1 sketch template

27． 如图21所示的电路中电源电压为9V且保持不变灯泡上标有“6V 6W 字样当�动变阻器的�片置于最右端时电压表的读数为2V求 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

如图所示电路中电源电压U=45V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

如图所示的电路中若要使灯L1和L2组成并联电路应闭合开关应断开开关 A．S2S3S1B．S1S3S2C．S1S2S3——青 sketch template

在如图所示的电路中电源电压保持不变当开关S由断开到闭合电流表两次示数之比是1∶5由此可知电阻与之比是 A．5∶1 B．1∶5 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

如图所示电路中电源电压适当要使电铃和电灯同时有电流通过以下做法中正确的是A．闭合S2断开S1S3 B．断开S3闭合S1S2 C sketch template

题目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R的�片P�左移动在此过程中 A电压表V1示数变小电压表V2示 sketch template

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