如图1所示电源电势为e内阻为r当�动变阻器r′的�片�右� 动时以下结论正的是 A．电源的总功率增大 b．r1的功率减小 C Sketch Coloring Page

如图1所示电源电势为e内阻为r当�动变阻器r′的�片�右� 动时以下结论正的是 A．电源的总功率增大 b．r1的功率减小 C Template

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tomski如图1所示电源电势为e内阻为r当�动变阻器r′的�片�右� 动时以下结论正的是 a．电源的总功率增大 coloring

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电源电动势E=24V内阻r=4ΩR0=1Ω直流电动机内阻R0′=1Ω当调节�动变阻器R1为某值时可使甲电路输出功率最大调节 sketch template

19．如图所示电源电压U及电阻R1均为恒定值当与R1 串联的可变电阻R2分别被调为8Ω和2Ω时可变电阻R2的功率都是2W则R1的阻值为 sketch template

如图所示的电路中电源的电压保持不变R1为定值电阻R2为�动变阻器闭合开关S�片P�右移动时则A．电流表A的示数变大B．电压表V的示 sketch template

一轮复习：含容电路知乎 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

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

题目某实验小组设计如图所示电路图来测量电源的电动势及内阻其中待测电源电动势约为2V内阻较小所用电压表量程为内阻非常大可看作理想电压表 sketch template

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电源的电动势和内阻 – I叨咕物理 sketch template

如图1 30 11所示的电路中电源由6个电动势E0=15 V内电阻r0=01 Ω的电池串联而成定值电阻R1=44 ΩR2=6 Ω sketch template

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如左图所示的电路中电源电动势为30V内阻不计L1L2L3为3个相同规格小灯泡这种小灯泡的伏安特性曲线如右图所示．当开关S闭合后 sketch template

在如图甲所示的电路中电源电动势为30V内阻不计L1L2L3为3个特殊材料制成的相同规格小灯泡这种小灯泡的伏安特性曲线如图乙所示 sketch template

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某同学采用如图甲所示的电路测定电源电动势和内电阻已知干电池的电动势约为15V内阻约为2Ω电压表V电流表A�动变阻器有R1和R2各一 sketch template

如图所示电路电源电动势E=90V内阻r=5ΩR1=10ΩR2=20Ω板面水平放置的平行板电容器的两极板MN相距d = 3cm在两 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

如图所示的电路中，电源电动势为，内阻为，四个定值电 高途 sketch template

如图1所示电源电势为E内阻为r当�动变阻器R′的�片�右� 动时以下结论正的是 A．电源的总功率增大 B．R1的功率减小 C sketch template

如图所示电源电动势为E内阻为r．电路中的R2R3分别为总阻值一定的�动变阻器R0为定值电阻R1为光敏电阻其电阻随光照强度增大而减小 sketch template

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 sketch template

如图所示电路中电源电动势为E内阻为r电阻R1R2为定值电阻R为�动变阻器AB为电容器的两个极板电压表和电流表均为理想表电源 sketch template

如图所示电源电动势为E内阻为rR1＞r当电路中�动变阻器R2的�动触头P�上�动时以下说法正确的是 A．电容器C的下极板的带电量 sketch template

在如图所示的电路中电源电压为12伏且保持不变定值电阻R1的阻值为20欧�动变阻器R2上标有“20Ω 1A 字样．闭合电键S电压表示数为 sketch template

如图所示电源电动势为E内电阻为r．当�动变阻器的触片P从右端�到左端时�现电压表V1V2示数变化的绝对值分别为 U1和 U2下列说法 sketch template

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