A.1:2:3 | B.3:2:1 | C.6:3:2 | D.1:1:1 |
A.P4>P1>P3>P2 | B.P4>P1>P2>P3 |
C.P1>P4>P2>P3 | D.P1>P4>P3>P2 |
A.滑片置于a端时R两端的电压为0 |
B.滑片置于b端时变阻器接入电路中的电阻为0 |
C.滑片置于a端时R与r串联 |
D.滑片置于b端时R与r并联 |
A.流过可变电阻器R的电流增大为原来的2倍 |
B.可变电阻器R消耗的电功率增加为原来的4倍 |
C.可变电阻器两端的电压减小为原来的 |
D.若可变电阻器R的阻值减小到零,那么电压表的示数为4U0 |
A.2:3 | B.1:3 | C.1:2 | D.3:1 |
A.①2.00V,②1.00A,③0.50A |
B.①1.00V,②0.50A,③2.00V |
C.①2.00V,②0.50A,③1.00A |
D.①0.50A,②2.00V,③1.00A |
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