A、50
B、40
C、30
D、20
更多“两个电阻并联，其中R<sub>1</sub>为200Ω，通过R<sub>1</sub>的电流I<sub>1</sub>为0.2A，通过整个并联电路的电流I为1A，则R<sub>2</sub>=（）Ω。”相关的问题
A、R<sub>1sub>与R<sub>3sub>串联后与R<sub>2sub>并联 B、R<sub>1sub>与R<sub>3sub>并联后与R<sub>2sub>串联 C、R<sub>1sub>与R<sub>2sub>并联后与R<sub>3sub>串联 D、R<sub>1sub>与R<sub>2sub>串联后与R<sub>3sub>并联
A、（R<sub>1sub>+R<sub>2sub>）/R<sub>1sub>R<sub>2sub> B、R<sub>1sub>R<sub>2sub>/（R<sub>1sub>+R<sub>2sub>） C、R<sub>1sub>+R<sub>2sub> D、R<sub>1sub>R<sub>2sub>
A、已知电路如图所示，其中E<sub>1sub>=15V，E<sub>2sub>=65V，R<sub>1sub>=5Ω，R<sub>2sub>=R<sub>3sub>=10Ω。试用支路电流法求R<sub>1sub>、R<sub>2sub>和R<sub>3sub>三个电阻上的电压。rc="https://img.ppkao.com/2018-09/tangxueping/2018092817031193342.jpg" />
A、R′＞R；R〞＞R；R′＞R〞 B、R′＜R；R〞＜R；R′＜R〞 C、R′＞R；R〞＜R；R′＜R〞 D、无法判断
A、如图所示为电桥电路，已知R<sub>1sub>=1Ω、R<sub>2sub>=2Ω、R<sub>3sub>=2Ω、R<sub>4sub>=4Ω、R<sub>5sub>=5Ω，试求等效电阻R<sub>absub>。rc="https://img.ppkao.com/2018-05/tangxueping/2018051015543465216.jpg" />
A、r<sub>1sub>＝r<sub>2sub>＝0，L<sub>1sub>＝L<sub>2sub>＝M＝0 B、r<sub>1sub>＝r<sub>2sub>＝0，L<sub>1sub>＝L<sub>2sub>＝M＝∞ C、r<sub>1sub>＝r<sub>2sub>＝∞，L<sub>1sub>＝L<sub>2sub>＝M＝0 D、r<sub>1sub>＝r<sub>2sub>＝∞，L<sub>1sub>＝L<sub>2sub>＝M＝∞
A、集电极电阻R<sub>Csub>阻值 B、集电极电阻R<sub>Csub>阻值和负载电阻R<sub>Zsub>阻值 C、负载电阻R<sub>Zsub>阻值 D、集电极电阻R<sub>Csub>阻值和负载电阻R<sub>Zsub>阻值之和
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