A、（R1+R2）/R1R2
B、R1R2/（R1+R2）
C、R1+R2
D、R1R2
更多“两电阻R<sub>1</sub>，R<sub>2</sub>并联后，其总电阻等于（）”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>烧坏，R<sub>2sub>不会烧坏 B、R<sub>1sub>，R<sub>2sub>均烧坏 C、R<sub>1sub>未烧坏，R<sub>2sub>烧坏 D、R<sub>1sub>，R<sub>2sub>均未烧坏
A、R<sub>0sub>、R<sub>50sub>；R<sub>0sub>、R<sub>100sub> B、R<sub>0sub>、R<sub>100sub>；R<sub>100sub>/R<sub>0sub> C、R<sub>100sub>/R<sub>0sub>；R<sub>0sub>/R<sub>100sub> D、R<sub>0sub>/R<sub>100sub>；R<sub>0sub>、R<sub>50sub>
A、M<sub>Rsub>/M<sub>Ssub>≥1.0 B、M<sub>Rsub>/M<sub>Ssub>≥1.1 C、M<sub>Rsub>/M<sub>Ssub>≥1.2 D、M<sub>Rsub>/M<sub>Ssub>≥1.25
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、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>。src="https://img.ppkao.com/2018-05/tangxueping/2018051015543465216.jpg" />
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
A、Δ<sub>rsub>H<sup>θsup><sub>m1sub>－Δ<sub>rsub>H<sup>θsup><sub>m2sub> B、2Δ<sub>rsub>H<sup>θsup><sub>m1sub>+Δ<sub>rsub>H<sup>θsup><sub>m2sub> C、2Δ<sub>rsub>H<sup>θsup><sub>m1sub>—Δ<sub>rsub>H<sup>θsup><sub>m2sub> D、Δ<sub>rsub>H<sup>θsup><sub>m1sub>+ 2Δ<sub>rsub>H<sup>θsup><sub>m2sub>
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。src="https://img.ppkao.com/2018-09/tangxueping/2018092817031193342.jpg" />
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