7．如图4所示开关闭合后灯泡�光电压表和电流表分别测出了灯泡两端的电压和通过的电流并且两表的示数分别不超过3v和06a 1根据 Sketch Coloring Page

7．如图4所示开关闭合后灯泡�光电压表和电流表分别测出了灯泡两端的电压和通过的电流并且两表的示数分别不超过3v和06a 1根据 Template

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anonymous
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tomski7．如图4所示开关闭合后灯泡�光电压表和电流表分别测出了灯泡两端的电压和通过的电流并且两表的示数分别不超过3v和06a 1根据 coloring

7．如图4所示开关闭合后灯泡�光电压表和电流表分别测出了灯泡两端的电压和通过的电流并且两表的示数分别不超过3V和06A 1根据 sketch template

如图所示电路开关S闭合后四个灯泡都正常�光某时刻t因灯丝烧断而突然熄灭假设其它三灯丝都没烧断则 AL2变暗L3更亮L1不变 sketch template

如图7所示当开关闭合后�现小灯泡不亮电流表无示数用电压表测量�现Uab=0Ubc=6VUdc=0若电路中只有一处故障则其故障 sketch template

如图所示当开关S闭合时�现只有一灯�光且电压表示数为45V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

如图所示的电路中123456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

4．如图1所示在开关和小灯泡之间连着两个�属夹A和B在�属夹之间分别接入硬币铅笔芯橡皮和�料尺闭合开关后小灯泡能�光的是 A 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11所示闭合开关后标出电路中电流方�——青夏教育精英家教�—— sketch template

题目如右图所示家庭电路中当开关S闭合后灯泡L不亮用试电笔测试cd两点时氖管都�光测试ab两点时只有a点氖管�光则故障可能 sketch template

为了“测量小灯泡的电功率”，某小组同学设计了如图甲所示的电路图，已知小灯泡上标有“25V”字样。请回答下列问题： 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

在图4所示的电路中电源两端的电压为6V并保持不变R1R2为两个相同阻值的电阻开关S1闭合后下列说法中正确的是 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

当闭合开关试触时�现电流表指针的偏转如图a所示为了提高准确度接下来的操作是断开开关将电流表的量程改用．正确测出电路中的电流如图 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

题目如图所示为小排量汽车在lh的时间内在水平路面上匀速行驶了72 Km消耗汽油6 Kg若已知该汽车�动机的功率为23 KW汽车 sketch template

3．在图1所示的电路中当开关闭合后在�属夹AB之间分别接入硬币铅笔芯橡皮和�料尺小灯泡都能�光的是 A．接入硬币和�料尺 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电源电压保持不变闭合开关后将�动变阻器R2的�片P�右移动的过程中下列说法正确的是 A．电流表A的示数变小电压表V2的示 sketch template

如图4所示开关S闭合后�片P由a端�b端�动时R1的阻值将 电流表的示数将 电压表的示数将填“变大 “变小或“不变 ——青夏 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

10．某同学连接的电路如图7所示设电源电压不变当闭合开关将�动变阻器的�片�下�动时下面的说法中正确的是A．电压表示数变大电流表示数 sketch template

如图所示三个灯泡是相同的当开关闭合时电流表A3的示数为02A则电流表A1A2的示数分别为0606A和0404 A三个灯泡 sketch template

11．如图7所示当开关S闭合后电压表V2示数为10V电压表V1示数为8V若电源电压为15V则灯气两端电压为 A 2V B 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

5．在如图4所示的电路中当闭合开关S 后若将�动变阻器的�片P�下调节则 A．电压表和电流表的示数都增大 B．灯L2变暗电流 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9所示在弹簧测力计的挂钩下悬挂一个小水桶桶与水的总质量为5kg用细线系一个质量为178 Kg的铜球用手提细线上端将小球缓慢浸没在 sketch template

如图所示AB间电压保持不变．当开关S断开时电流表示数为05A这时用电器R2上的电功率是75W如果S闭合则电流表的示数为08A sketch template

如图所示的电路开关S闭合后将�动变阻器的�片P�右�动的过程中有关电流表和电压表的读数以及灯泡亮度的变化下列叙述正确的是 A电流 sketch template

题目如图所示的电路电源电压为 3 伏并保持不变定值电阻 R1 的阻值为 30 欧姆．当电键 S 闭合时电流表 A1 的示数为 04 sketch template

两个定值电阻R1、R2并联在电路中如图甲所示它们的电流与其两端的电压关系如图乙所示闭合开关S则R1R2产生的热量之比为 A 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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甲所示电路，电源电压恒为6V，�动变阻器R的规格为“25Ω、1A”，电流表量程选择“0∼06A”，电压表量程选择“0∼3V”，小灯泡上标 sketch template

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