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 Coloring Page

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 Template

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tomski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 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 05A”，电流表A的量程为006A，电压表量程为0 sketch template

百度教育 sketch template

小红用如图甲所示的实验电路“探究电流与电阻的关系”，实验中所用定值电阻的阻值分别为各一个。（1）电路图中�动变阻器的作用是和控制定值电阻两端 sketch template

百度教育 sketch template

如图甲所示是一种家庭水箱水位测量装置示意图，电源电压18V保持不变，电压表量程0〜15V，电流表量程0〜3A，R0是阻值为10Ω的定值电阻 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（00 6A）、出卷� sketch template

19．如图所示电源电压U及电阻R1均为恒定值当与R1 串联的可变电阻R2分别被调为8Ω和2Ω时可变电阻R2的功率都是2W则R1的阻值为 sketch template

“探究电流与电阻关系”的实验实物图如图甲所示，定值电阻的阻值分别为5Ω、10Ω、15Ω、20Ω。（1）连接电路时�现，电路中有一根导线连接错误 sketch template

题目实验小组的同学利用如图甲所示的电路进行探究电源电压恒为9V电压表V量程03V015V电流表A量程006A0 sketch template

如图所示的电路图是用来研究通过导体的电流跟导体电阻关系的，其中R1与R2为阻值不同的定值电阻，第一次实验用的定值电阻为R1 ，闭合开关后，记 sketch template

图甲是小灯泡L和定值电阻R的电流与电压的关系，则R的电阻为Ω，现将它们并联后接在电压为2V的电源两端，如图乙，则干路中的电流是A；若将它们串联 sketch template

题目如图所示电流表量程为0 06A电压表量程为0 15V电阻R0=30Ω电路两端电压恒为U=24V当�动变阻器接入电路的电阻 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R1R2产生的热量之比为 A 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如图所示电源电压保持不变闭合开关S将�动变阻器的�片P�左移动电压表V的示数 电压表V的示数与电流表A1的示数之比 电流表 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

如图所示，甲同学在做“测量小灯泡的电功率”实验。实验器材：电源（电压恒为6V）、小灯泡（额定电压为25V，正常�光时灯丝电阻约为10Ω sketch template

如图甲所示电源电压恒为18V灯泡L上标有“10V 5W 字样电流表量程为006A电压表量程为015V�动变阻器R的最大阻值为 sketch template

如图所示电源电压保持不变当闭合开关S�动变阻器的�片P�右移动的过程中下列说法正确的是A．电压表V1的示数增大电压表V2的示数减小B sketch template

如图所示电源两端电压不变R1为定值电阻R2为�动变阻器当�动变阻器的�片P�动时测出电压值电流值得出�动变阻器的功率P和电流I的 sketch template

如图所示电源电压恒定�动变阻器的规格为“30Ω 1A 在AB间接入规格为“12V 12W 的灯泡闭合开关当变阻器的五分之一阻值连入 sketch template

在如图甲所示的电路中R0为定值电阻R为�动变阻器电源电压不变闭合开关S后调节�片P从a端移动到b端过程中电流表示数I与电压表示数U sketch template

如图所示是研究电流与电压关系的电路图．开关S闭合后将�动变阻器的�片P从a端移至b端电流表与电压表关系如表乙所示实验时电源电压恒为3V不 sketch template

小明同学用如图所示的电路测定小灯泡的功率电路中电源电压恒为45V电压表的量程为0 3V电流表的量程为0 06A�动变阻器的规格为 sketch template

如图甲所示电源电压保持不变小灯泡的额定电压为12 V闭合开关S后当�片P从最右端�到最左端的过程中小灯泡的I–U关系图象如图乙所示 sketch template

【电路原理学习笔记�第3章：欧姆定律：31 电压、电流与电阻的关系电路原理笔记csdn CSDN博客 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

如下图电路中1当开关S闭合后电压表的示数表示 A．L1两端的电压 B．L2两端的电压 C．电源电压 D．L1和L2两端的电压 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

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

如图甲所示的电路，当闭合开关后两只电压表的指针偏转均如图乙所示，则电压表V1测得的是两端电压，电源电压是V，R1与R2的电阻之比为。 sketch template

如下图所示电源电动势为12 V内电阻为r＝1 ΩR1＝1 ΩR2＝6 Ω电动机线圈电阻为05 Ω若开关闭合后通过电源的电流为3 sketch template

题目如图甲所示电路电源电压恒为6V�动变阻器R的规格为“25Ω1A 电流表量程选择“006A 电压表量程选择“03V 小 sketch template

如图所示一理想变压器与定值电阻R1理想电流表A1共同接入电压恒为U的交流电源上原线圈接入电路的匝数可以通过调节�动触头P来改变副线圈 sketch template

如图甲所示电源电压恒为9伏�动变阻器的最大阻值为100欧电流在01安 04安之间时电子元件均能正常工作．若通过此电子元件的电流与其 sketch template

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