5．如图所示将�动变阻器的�片p�右�动时那么 A．v示数变大a示数变小 b．v示数不变a示数变小 C．v示数变小a示数变大 Sketch Coloring Page

5．如图所示将�动变阻器的�片p�右�动时那么 A．v示数变大a示数变小 b．v示数不变a示数变小 C．v示数变小a示数变大 Template

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tomski5．如图所示将�动变阻器的�片p�右�动时那么 a．v示数变大a示数变小 b．v示数不变a示数变小 coloring

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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

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如右图所示的电路电源电压U=25V已知灯泡的电阻是5Ω�动变阻器的 最大电阻是20Ω当�动变阻器的�片P从a点移动到b点的过程中灯泡 sketch template

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3．如图所示�动变阻器的总电阻R=60ΩAB间的电压U=18V且保持不变R0=60Ω先将开关S断开移动�片P使电压表示数 为9 sketch template

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如图所示�动变阻器有ABCD四个接线柱将其中的两个接线柱接人电路改变电路中电流的大小正确的连接方式最多有 A．一种 B．二种 sketch template

如图所示闭合开关S在�动变阻器�片P�右�动过程中下列说法正确的是 A．电压表V1示数变大灯泡L的实际功率变小B．电压表V2示数变 sketch template

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