如图所示要使灯l1和l2串联则关于1234四个接线柱的连接正确的是 A．只需连接1和2b．只需连接2和3c．只需连接3和4d Sketch Coloring Page

如图所示要使灯l1和l2串联则关于1234四个接线柱的连接正确的是 A．只需连接1和2b．只需连接2和3c．只需连接3和4d Template

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tomski如图所示要使灯l1和l2串联则关于1234四个接线柱的连接正确的是 a．只需连接1和2b．只需连接2和3c．只需连接3和4d coloring

1如图甲所示电路中要使灯L1和L2连接成并联电路应闭合S2S3同时断开开关S1要使两灯连接成串联电路应闭合开关S1同时断开开关 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

如图所示要使灯L1和L2串联则关于1234四个接线柱的连接正确的是 A．只需连接1和2B．只需连接2和3C．只需连接3和4D sketch template

如图所示若要使灯泡L1和L2组成串联电路应只闭合S2若要使灯泡L1和L2组成并联电路应只闭合S1和S3若同时闭合S1和S2电路会 sketch template

如图所示要使灯L1L2串联应闭合开关 要使L1L2并联应闭合开关为了保护电路不能同时闭合开关．——青夏教育精英家教�—— sketch template

如图所示的电路中要使灯L1L2并联�光则应闭合开关 A．S1 B．S1S3 C．S2S3 D．S1S2S3——青夏教育精英家教�—— sketch template

如图所示的电路中若只需要灯L1亮则需要闭合开关 要使灯LlL2串联则应只闭合开关 要使灯L1L2并联则应闭合开关．——青夏 sketch template

如图所示要使灯泡L1和L2组成并联电路应 A．只闭合S2 B．只闭合S3C．只闭合S1和S3D．只闭合S2和S3——青夏教育精英家教�—— sketch template

如图所示要使灯泡L1和L2组成并联电路应 A．只闭合S2 B．只闭合S3C．只闭合S1和S3D．只闭合S2和S3——青夏教育精英家教�—— 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15V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要使灯泡L1和L2串联在电路中应闭合开关若要使L1和L2并联在电路中应闭合开关绝对不允许同时闭合开关因为此时电路处于 sketch template

如图所示要使灯L1和L2串联应闭合开关S2S2要使灯L1和L2并联应闭合开关S1S3S1S3绝对不允许同时闭合开关S1S2S1 sketch template

如图所示电路中1要使灯L1L2串联则应闭合电键 2要使灯L1L2并联则应闭合电键 3如果同时闭合电键S1S3则会 sketch template

如图所示若只需灯L1�光则需用导线只连接 接线柱若只用导线连接BC接线柱则灯L1L2 联若使灯L1L2并联则接线柱A与B连接 sketch template

如图所示电路中甲乙丙分别为电流表或电压表要使电路中的灯L1和L2串联则乙为表丙为电压表要使电路中的灯L1和L2并联则甲为表 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

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已知两只灯泡Ll和L2是串联的则在��和�三个电表中下列判断正确的是 A．�是电流表�和�是电压表B．�和�是电压表� sketch template

如图将灯L1“6V 3W 和L2“6V 6W 串联现要使其中一盏灯长时间正常�光则电源电压是 V电路消耗的总功率是 W 题目和参考答案 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

如图所示当S1S2都断开时灯L1L3L1L3�光它们的连接方式是串联串联联当S1S2都闭合时灯L2L3L2L3�光它们 sketch template

16．要用一个�动变阻器来同时控制图所示中灯泡L1L2的亮度关于�动变阻器连入图中的位置下列说法正确的是 A．只能连在cd间 B sketch template

23．如图将灯L1“6V 3W 和L2“6V 6W 串联现要使其中一盏灯长时间正常�光则电源电压是 V电路的总功率是 W．——青夏教育 sketch template

如图所示的电路：（1）若要使灯L1与L2并联，开关S只控制灯L1则线头M应接在点上．（2）若要使灯L1与L2并联，开关S同时控制灯 sketch template

某同学在木板上安装如图所示的三只灯泡已知灯泡L1和L3的电阻分别为R1=5欧R3=20欧连好电路后要测电源电压时�现连接电压表的导线 sketch template

如图所示灯L1L2上分别标有“6V 3W “5V 5W 的字样当开关S闭合时一灯正常�光一灯偏暗则A1A2两电流表的示数之比是 sketch template

如图所示电路灯L1标有“24V 16W 灯L2标有“12V ．两灯串联后接在电压为U的电路中为使它们都不被烧坏下列说法正确的是 sketch template

图6所示要使灯泡L1和L2组成串联电路则应该闭合的开关是 A．只闭合S2 B．只闭合S3 C．同时闭合S1和S2 D．同时闭合S1和S3 sketch template

如图所示L1和L2是两个相同的灯泡如果要仅使灯L1工作则A应闭合开关S2S3B应闭合开关S1S3C应闭合开关S1S2D只 sketch template

如图所示电路如果要使灯L1和L2并联则需要闭合开关如果要使灯L1和L2串联则需要闭合开关题目和参考答案——青夏教育精英家教�—— sketch template

如图所示是小华家的部分家庭电路的电路图小华在用台灯L2学习时突然台灯L2灯丝断了而屋内的照明灯L1依然正常�光小华用试电笔检测插座c sketch template

如图所示电路灯L1标有“24V 16W 灯L2标有“12V ．两灯串联后接在电压为U的电路中为使它们都不被烧坏下列说法正确的是 sketch template

如图所示要使灯L1L2组成串联电路则应闭合开关绝对不能同时闭合开关．题目和参考答案——青夏教育精英家教�—— sketch template

小华将额定电压相同的两只小灯泡L1L2串联在电路中如图所示．合上开关时�现灯L1亮而灯L2不亮当他用一根导线并接在灯Ll的两端时�现 sketch template

小明家台灯的插头插在如图所示的插座上插座上有一个开关和一个指示灯．若插座开关和指示灯用S1L1表示台灯开关和灯泡用S2L2表示．小明 sketch template

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