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 Coloring Page

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 Template

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tomski13．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 coloring

13．如图甲所示为一个小灯泡的两端电压与通过它的电流的变化关系曲线 1若把三个相同这样的灯泡串联后接到电压恒定的12V电源上求流过小 sketch template

如图甲所示是“测定小灯泡电功率”实验的装置图，电源电压为4V且保持不变，小灯泡额定电压为25V，阻值约为9Ω，�动变阻器标有“20Ω 1A”字样。 sketch template

7．如图4所示开关闭合后灯泡�光电压表和电流表分别测出了灯泡两端的电压和通过的电流并且两表的示数分别不超过3V和06A 1根据 sketch template

题目如图所示电源电压保持不变灯泡L标有“6V 6W 字样当S和S1都闭合时电压表示数为10V当闭合S断开S1时灯泡L正常�光 sketch template

题目如图所示电源电压不变L1L2两个灯泡的规格相同闭合开关S当�动变阻器的�片P都从中点�右�动的过程中关于两灯的亮度情况 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1甲电路所示电源电压为9V且保持不变小灯泡标有“6V6W 的字样小灯泡的电流随电压的变化曲线如图乙．1当电流表的示数为05A sketch template

如图甲所示电源电压保持不变小灯泡的额定电压为12V�动变阻器的最大阻值为15Ω闭合开关S后当�片P从最右端�左�动过程中电压表的示 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

百度教育 sketch template

如图所示把标有“6V 3W 的小灯泡与最大阻值为100Ω的�动变阻器连接在电源电压恒为18V的电路中各表的示数均不超过所选量程且灯泡两端 sketch template

题目如图所示电源电压恒定闭合开关L1L2两灯均正常�光电流表和电压表均有示数过一会儿其中一只灯泡突然熄灭两个电表示数均不变 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

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

如图所示电源电压保持12V不变小灯泡L上标有“6V3W 字样�动变阻器最大阻值R=60Ω．不考�温度对灯丝电阻的影响下列说法正确的是 sketch template

中考物理知识点：测量小灯泡的电阻 欧姆定律中考� sketch template

百度教育 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

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甲所示是小明“探究电流与电压、电阻的关系”的实验电路图。选用的实验器材是：电源3V、电流表（00 6A）、出卷� 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

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4所示当开关S闭合时灯L1L2均不亮某同学用一根导线探究其故障当把导线并接在灯L1两端时�现灯L2亮灯L1不亮当把导线并接在 sketch template

题目如图所示的U I图象中直线Ⅰ为某电源的路端电压与电流的关系图线直线Ⅱ为某一电阻R的U I图线用该电源直接与电阻R连接成闭合电路 sketch template

电路如图题342所示，电源vs为正弦波电压，试绘出负载RL两端的电压波形，设二极管是理想的。上学吧找答案 sketch template

如图9所示电源两端的电压为12V且保持不变电阻R1与 R2 的比值是4﹕1当开关S1闭合S2断开时10s内电流通过R1产生的热量是 sketch template

如图8所示电源电压12V电阻R阻值为2Ω电压表所选量程为 0 3V为了不损坏电压表变阻器凡的阻值应 A不高于2Ω 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

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电源电压不变当开关S1S2同时闭合时电流表的示数是03A电压表示数是6V．若两表互换位置当开关S2闭合S1断开时电流 sketch template

题目如图所示电源电压保持不变闭合开关后当�动变阻器的�片由左�右移动时下列判断正确的是A 电压表示数变大B 电流表示数变大C 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电源电压保持12V不变小灯泡L上标有“6V 3W 字样�动变阻器最大电阻值R=48Ω闭合开关若不考�灯丝电阻随温度的变化 sketch template

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