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 Coloring Page

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 Template

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tomski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 coloring

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

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L2串联则应只闭合开关S2要使灯L1L2并联则应只闭合开关S1S3不允许同时闭合开关S1S2 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LlL2串联则应只闭合开关 要使灯L1L2并联则应闭合开关 ．——青夏 sketch template

如图所示的电路中闭合开关S电路正常工作过了一会儿灯L熄灭若电路中只有一处故障且只�生在灯L或电阻R上现将一只完好的小灯泡L1并联 sketch template

如图所示电路中若只使灯L1�光必须闭合的开关是S3若此时使灯L2也�光必须再闭合的开关是S1．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示的电路要使灯泡 L1 和 L2 组成串联电路应该 A．只闭合 S2B．只闭合 S1C．同时闭合 S1 S2D．同时闭合 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

如图所示电路中1若使L1L2串联则应闭合 断开 2若使L1L2并联则应闭合 3如果闭合S1S3而断开S2 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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

如图所示电路中要使灯L1L2串联则应该闭合开关 若要使两灯并联则应该闭合开关 同时闭合开关 是不允许的．——青夏教育精英家教�—— sketch template

如图所示L1L2是两个相同的小灯泡ABCD是四个接线柱若用导线将AB和CD分别连接起来则灯L1L2是联的若用导线只将 sketch template

题目如图所示连接两只小电灯L1L2的两种电路中电源电压相同且保持不变闭合开关有关判断正确的是 A图甲中L2两端的电压小于图 sketch template

如图所示的电路中若要使L1和L2两灯组成并联电路开关的断开与闭合情况应是 A．S1S2断开S3闭合B．S1S2闭合S3断开C 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

在如图所示的电路中当开关S1S2都闭合后则 A．L1L2两灯串联B．L1L2两灯并联C．灯L1被短路D．灯L2被短路题目和 sketch template

如图所示电路中S1闭合S2断开L1L2是两个完全相同的灯泡若将S2闭合后L1的亮度将A不变 B变亮C变暗D如何变化不能 sketch template

如图所示的电路中电源电压为3V闭合开关后三个电流表A1A2A示数分别为I1I2I已知I=06AI1=04A则通过灯L1 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

在“组成串联电路 的学生实验中如图所示是小林同学实验的电路图当开关S合上后他�现灯L1与L2均不亮小林同学想了想然后拿起一根导线开始 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

如图所示电路中1若使L1L2串联则应闭合 断开 2若使L1L2并联则应闭合 3如果闭合S1S3而断开S2 sketch template

如图6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 12如图5要 sketch template

如图所示电路中 1若使L1L2串联则应闭合 断开 2若使L1L2并联则应闭合 3如果闭合S1S3而断开S2 sketch template

如图所示电路中 1若使L1L2串联则应闭合 断开 2若使L1L2并联则应闭合 3如果闭合S1S3而断开S2 sketch template

如图所示的两个电路中电源电压保持不变闭合开关S当�动变阻器的�片P都�右移动时灯泡LlL2的亮度变化是A．LlL2都变亮B．L1 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

如图所示的电路中若同时闭合开关S1和S3、断开S2电阻R1与R2是 的若只闭合开关S2电阻R1和R2是 的均选填 sketch template

在图所示电路中电源电压相等且保持不变三个电流表中有两个电流表的示数相等下列说法正确的是A．若电流表A1A3的示数相等则R1＝R3 sketch template

如图所示的电路中若L1和L2并联则要闭合 若L1和L2串联则要闭合 ．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要使灯L1和L2组成串联电路应只闭合开关S2要使灯L1和L2组成并联电路应闭合开关S1S3若闭合开关S1和S2 sketch template

如图所示在电路中要使电灯L1和L2并联应闭合开关 ．当同时闭合开关S1和S2可以工作的灯是为了防止电路中电源出现短路不能同时闭合 sketch template

如图所示的电路中下列说法中正确的是 A只闭合S1L1�光 BS1S2都闭合L1L2都�光 C只闭合S2L2�光 DS1 sketch template

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