如图所示开关s闭合时可能�生的现象是 A．l1被烧坏b．l1l2均不�光c．电池被烧坏d．l2被烧坏——青夏教育精英家教�—— Sketch Coloring Page

如图所示开关s闭合时可能�生的现象是 A．l1被烧坏b．l1l2均不�光c．电池被烧坏d．l2被烧坏——青夏教育精英家教�—— Template

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tomski如图所示开关s闭合时可能�生的现象是 a．l1被烧坏b．l1l2均不�光c．电池被烧坏d．l2被烧坏——青夏教育精英家教�—— coloring

如图所示当开关S闭合时�现只有一灯�光且电压表示数为45V产生这一现象的原因可能是 A灯L1断路 B灯L1短路 C灯L2 sketch template

如图所示当开关S闭合时�生的现象是 A．L1L2都�光B．L1�光L2不�光C．电源损坏D．L1的灯丝烧断题目和参考答案——青夏 sketch template

如图所示开关S闭合S1断开时电流表A1的示数为01A电流表A的示数为03A则通过灯L2的电流为 A若开关SS1都闭合则电流 sketch template

如图4所示当开关S闭合时灯L1L2均不亮某同学用一根导线探究其故障当把导线并接在灯L1两端时�现灯L2亮灯L1不亮当把导线并接在 sketch template

如图当开关S闭合S1打开时电流表A的示数为I．当开关SS1都闭合时电流表A的示数为I′．比较II′大小正确的是 A．I=I′B sketch template

如图所示开关S3闭合时可能�生的现象是 A．E1�光E2不�光B．E1E2均可�光C．E1不�光E2�光D．电池被烧坏——青夏 sketch template

如图18当开关S1闭合时电流表示将A增大 B不变 C减� D无法判断——青夏教育精英家教�—— sketch template

如图所示开关s闭合后三个灯泡属于并联的电路是 A．B．C．D．——青夏教育精英家教�—— sketch template

如图所示的电路中，电源电压保持不变。闭合开关S后，�片P从b端移动到a端的过程，电压表示数U与电流表示数I的关系图像如图所示。下列说法正确的是（ sketch template

如图所示开关S3闭合时可能�生的现象是 A．E1�光E2不�光B．E1E2均可�光C．E1不�光E2�光D．电池被烧坏——青夏 sketch template

19．如图所示当开关S闭合时电压表V的示数为45VV1的示数为25V则R1R2的阻值之比为 A．59 B．95 C．4 sketch template

如图所示开关S闭合时可能�生的现象是 A．L1被烧坏B．L1L2均不�光C．电池被烧坏D．L2被烧坏——青夏教育精英家教�—— 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

15．如图所示当开关S闭合时有可能造成电流表和电源都损坏的电路是 ——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

如图所示电路开关S1闭合后S2的断开与闭合使电流表A2的两次示数之比为35由此可知R1与R2的阻值之比为23S2断开再闭合的过程 sketch template

如图所示当开关S断开�动变阻器的�片P置于a端时电流表的示数为03A当开关S闭合�片P置于b端时电流表的示数为05A．已知R1 sketch template

如图所示闭合开关S后灯L�光电流表有示数但灯L不�光这可能是 A．灯L的灯丝断了或灯L灯座接触不良 B．电流表的两个接线柱间被 sketch template

如图所示电路中开关S闭合时下列判断正确的是 A．两灯都变暗B．两灯都变亮C．A灯变暗B灯变亮D．A灯变亮B灯变暗题目和参考答案 sketch template

如图所示电路电源两端电压为6V且保持不变当只闭合开关S1时电流表的示数为05A只闭合开关S2时电流表的示数为02A只闭合S3时 sketch template

如图所示的电路中三个灯泡始终完好当开关S闭合时 A．L2L3不亮L1亮B．三灯都亮C．L2不亮L1L3亮D．三灯都不亮题目和 sketch template

如图所示电源电压保持不变闭合开关S1S2电压表示数为6V电流表示数为06A断开S2后电压表示数变为2V则R2的电阻和电源电压 sketch template

如图所示当开关S1闭合时电流表的示数为1A开关S1S2同时闭合时电流表的示数为15A．已知电阻R1为20Ω求1电源电压 sketch template

如图所示开关S3闭合时可能�生的现象是 A．E1�光E2不�光B．E1E2均可�光C．E1不�光E2�光D．电池被烧坏——青夏 sketch template

如图所示电源电压保持不变当开关S1闭合S2断开时电压表的示数是28V当S1断开S2闭合时电压表的示数为6V则灯L1与L2两端的 sketch template

如图所示开关S闭合后L1和L2都不�光将电压表并联在ab之间时电压表示数为0将电压表并联在bc之间时电压表示数较大若电路中只有一 sketch template

19．如图所示电源电压不变R1=6ΩR2=4Ω． 1当开关S1闭合S2S3断开时电流表的示数为06A电路总电阻是 Ω电源 sketch template

在如图所示当开关S闭合时下列说法正确的是 A 甲是电流表它测量的是通过灯L1的电流B 乙是电压表它测量的是灯L1两端的电压C sketch template

如图所示电源电压不变当开关S闭合时电流表示数是1A当开关S断开时电流表示数是06A则电阻R1与电阻R2的阻值之比是 A．3 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

如图所示的电路中电源电压保持不变R为定值电阻当开关闭合时标有“6V 3W 的小灯泡L恰好正常�光若保持R不变将L换成另一只标有 sketch template

当电路中的开关S闭合时两只电流表A1A2的示数分别如图所示问 1电流表A1A2使用的量程和示数分别是多� 2通过灯泡L1 sketch template

在如图所示的电路中当开关S1闭合S2断开时电压表的示数为25V当开关S1断开S2闭合时电压表的示数为6V则灯泡L2两端的电压为A sketch template

如图所示电路只闭合开关S1时L1和L2组成串联电路闭合开关S2S3时L1和L2组成并联电路不能同时闭合开关S1S2S3否则将 sketch template

如图所示电路中只闭合开关S灯泡L恰能正常�光若再闭合S1则电流表的示数变大灯泡亮度不变．题目和参考答案——青夏教育精英家教�—— sketch template

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