题目内容
(请给出正确答案)
[单选题]
R1和R2组成的并联电路,R1=2R2时,有()
A.I1=2I2
B.U1=2U2
C.P1=2P2
D.总电阻R=3R2
提问人:网友lixin080108
发布时间:2022-01-07
A.I1=2I2
B.U1=2U2
C.P1=2P2
D.总电阻R=3R2
三个电阻R1、R2、R3串联后接在电路两端,已知R1=2R2,R2=3R3,R2两端的电压为15V,试求电路两端的电压。
R1和R2为两个并联电阻,已知R1=2R2,且R2上消耗的功率为1W,则R1上消耗的功率为()。
A.2W
B.1W
C.4W
D.0.5W
A.R1 = R2 = RF
B.R1 = R2 =2RF
C.R1 = RF =2R2
D.2R1 = RF =R2
A.R1 = R2 = RF
B.R1 = R2 =2RF
C.R1 = RF =2R2
D.2R1 = RF =R2
A.R1 = R2 = RF
B.R1 = R2 =2RF
C.R1 = RF =2R2
D.2R1 = RF =R2
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