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 Coloring Page

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 Template

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tomski4．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 coloring

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

1．如图1所示当闭合开关S后通电螺线管Q端附�的小磁针N极转�Q端则 A．通电螺线管的Q端为N极电源a端为正极 B．通电螺线管 sketch template

如图所示的家庭电路中有两个器件连接错误它们是A闸刀开关和带开关的灯泡B带开关的灯泡和带熔丝的二线插座C带开关的灯泡和三线插座D闸刀 sketch template

如图1所示闭合开关后能测出小灯泡L1两端的电压的电路是 ——青夏教育精英家教�—— 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

用电流表和电压表测25V小灯泡额定功率．实验电路如图甲所示．闭合开关调节�动变阻器�片当小灯泡正常�光时电流表示数如图乙所示．1 sketch template

题目如图甲所示的电路中小灯泡L标有“6V 3W 字样闭合开关SS1断开开关S2将�动变阻器的�片P从最左端移动到最右端在图乙中 sketch template

3．下列点路图中闭合开关P是灯泡R亮的必要不充分条件的是 A B C D——青夏教育精英家教�—— sketch template

如图所示是小明同学研究串联电路中电流电压特点的 实物连接图当开关闭合时灯L1不亮灯L2亮电流表的指针明显偏转电压表示数为电源电压 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

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

题目如图所示的电路中电源电压为 6V且保持不变�动变阻器 R 的规格为“40Ω 1A 定值电阻 R1的规格为“10Ω 05A 只 sketch template

3．在图1所示的电路中当开关闭合后在�属夹AB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甲所示是“测定小灯泡电功率”实验的装置图，电源电压为4V且保持不变，小灯泡额定电压为25V，阻值约为9Ω，�动变阻器标有“20Ω 1A”字样。 sketch template

3．如图所示在开关和灯泡之间连着两�属夹A和B在� 属夹之间分别接入硬币铅笔芯大头针橡皮不能使灯泡�光的是 ——青夏教育精英家教�—— sketch template

如图1所示开关S闭合时可能�生的现象是 A只有灯L1亮 BB只有灯L2亮 CL1被烧坏 D电池被烧坏——青夏教育精英家教�—— sketch template

如图所示是家庭电路的一部分请把白炽灯和开关连入家庭电路——青夏教育精英家教�—— sketch template

小明同学连接了如图所示的实验电路．实验时他注意比较了电路在开关闭合前后的现象．下列符合观察事实的是A开关闭合前后灯泡均能�光B开关闭合 sketch template

如图所示的电路中电源电压保持不变当开关闭合�片由b端�a端移动的过程中以下说法正确的是 A．电压表的示数减小电流表的示数增大B sketch template

题目如图所示的电路中电源电压恒为3V灯泡L1标有“3V 3W L2标有“6V 的字样电流表的量程为0 06A电压表的量程 sketch template

如图所示是小明制作的一只模拟调光灯电源电压为3V小灯泡额定电压为25V闭合开关时回形针在铅笔芯最右端�左移动回形针如果小灯泡正常 sketch template

在如图所示的电路中电源两端的电压保持不变．闭合开关S后将�动变阻器的�片P�右移动下列说法中正确的是 A．电流表A1的示数变小电压 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

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

小敏用如图甲所示的电路图研究通过导体的电流与导体电阻的关系电源电压恒为6V改变电阻R的阻值调节�动变阻器�片保持R两端的电压不变记 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

题目某同学利用如图所示的电路测量小灯泡的电阻小灯泡标有“2．5 V 的字样他记录的实验数据如下表所示其中有一次记录的电流表示数是错误 sketch template

如图所示，电源电压恒为18V，定值电阻R1=20Ω，�动变阻器R2标有“40Ω 05A”，电流表A的量程为006A，电压表量程为0 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

某同学连接的电路如图所示闭合开关后无论怎样调节�动变阻器灯泡L1L2都不亮．他用电压表进行电路故障检测把电压表并联接在某两点之间 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电路闭合开关�现两灯泡均不亮．于是小文用一根导线检查故障．�闭合开关将导线连接在ab之间�现两灯不亮�闭合开关将导线连在b sketch template

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