如图所示有两只灯泡�动变阻器开关干电池两节电流表一个要用�动变阻器控制l1的电流且�片p�右移动时电流表示数增大l2的亮度不变 Sketch Coloring Page

如图所示有两只灯泡�动变阻器开关干电池两节电流表一个要用�动变阻器控制l1的电流且�片p�右移动时电流表示数增大l2的亮度不变 Template

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tomski如图所示有两只灯泡�动变阻器开关干电池两节电流表一个要用�动变阻器控制l1的电流且�片p�右移动时电流表示数增大l2的亮度不变 coloring

按如图所示的实物图当开关闭合时正确的是 A．两只灯泡是串联的 B．灯泡L2是被短路的C．灯泡L1是被短路的D．两只灯泡是并联的 题目和参考 sketch template

如图所示将两只额定电压相同的灯泡L1L2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

如图所示将两只额定电压相同的灯泡L1L2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 sketch template

1请在方框内设计出两个灯泡串联的电路图并根据电路图完成实物图连接．2画出用下面的�轮组提升重物最省力的绕线方法．题目和参考答案 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现有两只灯泡电源电流表开关及�动变阻器各一个．某小组要设计符合如下要求的电路灯L1L2要并联电流表测通过灯L2的 电流 sketch template

如图所示电路闭合开关两只灯泡都不亮且电流表和电压表的指针都不动．现将两灯泡L1和L2的位置对调再次闭合开关时�现两只灯泡仍不亮电流 sketch template

如图所示电路两只灯泡L1和L2上分别标有“8V 4W 和“4V 1W 将它们与�动变阻器串联后加在8V的电源上闭合开关S当�动变阻器的 sketch template

如图所示有两节干电池两个小灯泡L1L2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

如图所示有两只灯泡�动变阻器开关干电池两节电流表一个要用�动变阻器控制L1的电流且�片P�右移动时电流表示数增大L2的亮度不变 sketch template

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 template

如图所示L1和L2是两只相同的小灯泡ab是电流表或电压表闭合开关S后若两灯都能�光则a表是 表b表是 表——青夏教育精英家教�—— sketch template

如图所示将两只额定电压相同的灯泡L1L2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

23． 如图14甲所示小灯泡L1和L2 额定电压均为6VAB分别为L1 和L2中的电流随两端电压变化关系的曲线现将两灯连入图乙所示 sketch template

如图所示是小华和小红做“测定小灯泡功率实验电路图．其中小灯泡的额定电压为25V灯丝电阻约10Ω左右电源为两节新的干电池�动变阻器上标 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当开关S闭合后两只灯泡均�光两表均有示数过一段时间后�现电压表示数变为0电流表示数增大经检查除小灯泡外其余器材的连接良好 sketch template

如图所示灯泡L1与�动变阻器串联灯泡L2与它们并联闭合开关后将�片�右移动时两只灯泡的亮度变化情况是 AL1变亮L2不变亮B sketch template

16．如图3所示的电路中要使灯泡L1和灯泡L2组成串联电路应将开关S1断开开关S2闭合开关S3 要使灯泡L1和灯泡L2组成并联电路 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

将两只额定电压相同的小灯泡L1L2串联在如图所示的电路中闭合开关后�现灯L1较亮灯L2较暗对此有下列几种猜想其中可能的是 �灯 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

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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

小明用如图1所示的电路图测小灯泡电阻．已知电源电压3V待测小灯泡额定电压为25V猜想电压表示数电流表示数灯泡断路灯泡短路1当开关 sketch template

一轮复习：描绘小灯泡伏安特性曲线知乎 sketch template

一轮复习：�动变阻器的选择知乎 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

一轮复习：纯电阻电路动态分析串反并同法知乎 sketch template

如图所示闭合开关S灯泡L1L2都能正常�光两只电表都有示数工作一段时间后灯泡L1突然熄灭L2仍然正常�光两只电表均无示数则 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标有“6V 36W 字样�动变阻器变化范围0 12Ω电源电压和小灯泡电阻不变S1始终闭合．求1小灯泡电阻RL是 sketch template

如图所示小亮做实验时把甲乙两只灯泡并联后接在电源上．闭合开关后�现甲灯不�光乙灯�光．经检查电路连接正确两只灯泡都完好无损．则甲 sketch template

如图 8所示是标有“25V 字样的小灯泡L的电阻值随它两端电压变化的图像将小灯泡L和电阻R接入如图 9所示的电路中电源电压为6V当开关 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

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