如图所示的电路中灯泡l1l2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 Coloring Page

如图所示的电路中灯泡l1l2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 Template

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tomski如图所示的电路中灯泡l1l2上分别标有“6v 3w “6v coloring

如图所示有两节干电池两个小灯泡L1L2电键和电流表电压表要求把小灯泡串联在电源上并用电压表测量L1两端电压用电流表测量电路的总 sketch template

在如图所示的电路中小灯泡L1和L2都标有“3V 025A 的字样电源由2节15V的干电池串联而成当S闭合后下列说法正确的是 A sketch template

如图所示小灯泡L标有“6V 3W 字样与一个额定功率为6W的定值电阻R0并联在电路中闭合开关小灯泡正常�光电流表的示数为075A．求 sketch template

如图所示将两只额定电压相同的灯泡L1L2串联在电路中闭合开关S后�现L1亮L2不亮对此有下列几种猜想其中可能的是 � L2灯丝断 sketch template

在如图所示的电路中两个相同的下灯泡L1和L2分别串联一个带铁芯的电感线圈L和一个�动变阻器R闭合开关S后调整R使L1和L2�光的亮度 sketch template

如图所示将两只额定电压相同的灯泡L1L2串联在电路中闭合开关S后�现灯泡L1较亮灯泡L2较暗此现象说明 A．灯泡L1的阻值大于 sketch template

如图所示的电路中小灯泡L1和L2都标有“3V 025A 字样电源由2节15V的干电池串联而成则下列说法中正确的是 A．S闭合后 sketch template

如图所示的电路中，电源电压为6V且保持不变，小灯泡L1标有“6V 6W”字样，小灯泡L2标有“6V 3W”字样。若不考�灯丝电阻的变化，则下列 sketch template

如图所示的电路中小灯泡L1和L2都标有“3V 025A 字样电源由2节15V的干电池串联而成则下列说法中正确的是 A．S闭合后 sketch template

如图所示的两个电路当�动变阻器�片�右移动时灯泡L1 L2亮度变化情况是 A．L1变亮L2变暗B．L1L2都变亮C．L1变暗L2不 sketch template

如图所示两只相同的白炽灯L1和L2串联接在电压恒定的电路中．若L1的灯丝断了经搭丝后与L2．串联重新接在原电路中则此时L1的亮度与灯丝 sketch template

如图所示的电路中开关s闭合后小灯泡L1L2均正常�光则下列说法正确的是 A．L1和L2在电路中并联B．L1和L2在电路中串联C．甲 sketch template

如图所示电路要使灯泡L1和L2组成串联电路应该 A．只闭合S3B．只闭合S2C．同时闭合S1和S2D．同时闭合S1和S3——青夏教育 sketch template

如图电路中灯泡L1标有“24V 8W L2标有“24V 16W 电源电压恒为24V闭合开关后 A．电流表A1和A2的示数相同B sketch template

如图所示电路中下列关于灯泡L1�L2L3连接说法中正确是 A．S1S2都断开L1L2L3串联B．S1S2都闭合L1L2 sketch template

一轮复习：描绘小灯泡伏安特性曲线知乎 sketch template

如图所示的四个电路开关S闭合后小灯泡L1L2串联的电路是A B C D 题目和参考答案——青夏教育精英家教�—— sketch template

如图所示的电路中电源电动势为6V当开关S接通后灯泡L1和L2都不亮用电压表测得各部分电压是Uab=6VUad=0Ucd=6V由此 sketch template

如图所示是探究并联电路中的电流关系的实物连接图1请在方框中画出相应的电路图2如果某同学做这个实验时已分别测出通过灯泡L1和L2的 sketch template

28．在图所示“组成串联电路 的实验中当开关S闭合后灯L1L2均不亮某同学用一根导线去查找电路的故障他将导线先并接在灯L1两端时 sketch template

在如图所示的电路中，有两根导线尚未连接，请用笔画线代替导线补上．补上后要求：闭合电键S后，灯L1和L2都能�光，且电流表只测量通过灯L2的电流 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

如图所示灯泡规格均相同甲图中电压恒为6V乙图中电压恒为12V．分别调节R1R2使灯均正常�光可变电阻接入电路中的电阻值之比R1R2 sketch template

如图所示，标有“6 V 3 W”字样的小灯泡与最大阻值为20 Ω的�动变阻器串联在电路中．当变阻器连入电路中的电阻为12 Ω时灯正常�光．不 sketch template

某实验小组的同学在一次实验中将一个标有“12 V 24 W 的灯泡和一个电阻R串联起来接在电路中如图所示闭合开关灯泡恰能正常�光如果 sketch template

如图所示的电路中123456为连接点的标号．在开关闭合后�现小灯泡不亮．现用多用电表检查电路故障需要检测的有电源开关小 sketch template

某同学在“测量小灯泡电阻 的实验中设计了如图22甲所示的电路图小灯泡上标有“38V15W 字样请完成和解答下列问题 1在图22 sketch template

如图所示红灯绿灯分别标有“12V 6W 和“12V 12W 的字样�动变阻器上标有“24Ω 2A 的字样当闭合开关SS1S2且 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小灯泡上标有“6V 3W 的字样�动变阻器上标有“20Ω 1A 的字样．则下列说法正确的是 A．灯泡的电阻为12ΩB．�动 sketch template

小红做实验时他按如图所示的电路图连接好电路闭合开关后�现两灯均不亮故障原因是两只灯泡中只有一只是坏的．现给你一根导线一个电压表一只 sketch template

如图所示的电路中闭合开关时�现灯泡L1L2均不亮电流表指针几乎没有偏转．某同学用一根导线去找电路故障他将开关闭合然后将导线并接在 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电源电压36V小灯泡L标有“20V 8W 字样若电流表量程为“0 06A 电压表量程为“0 15V 求�小灯泡的电阻是 sketch template

在如图所示的电路中闭合开关S灯L不亮电压表有示数若电路故障在灯L或电阻R上某一处对于故障的分析下列判断正确的是 A 一定 sketch template

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