A、用结点电压法求如图所示电路的U<sub>1sub>和I。
<img src="https://img.ppkao.com/2019-05/leiyawen/2019051609333393120.jpg" />
A、用结点电压法求如图所示电路的U<sub>1sub>和I。
<img src="https://img.ppkao.com/2019-05/leiyawen/2019051609333393120.jpg" />
A、I<sub>1sub>-I<sub>2sub>+I<sub>3sub>=5A B、I<sub>1sub>-I<sub>2sub>+I<sub>3sub>=-5A C、-I<sub>1sub>+I<sub>2sub>-I<sub>3sub>=0 D、I<sub>1sub>+I<sub>2sub>+I<sub>3sub>=0
A、I<sub>bsub>+I<sub>asub>-I<sub>1sub>=0 B、I<sub>bsub>-I<sub>asub>+I<sub>1sub>=0 C、I<sub>bsub>-I<sub>asub>-I<sub>1sub>=0 D、I<sub>bsub>+I<sub>asub>+I<sub>1sub>=0
A、I<sub>1sub>-I<sub>2sub>-I<sub>3sub>-I<sub>4sub> + I<sub>5sub>=0 B、I<sub>1sub>-I<sub>2sub> + I<sub>3sub>-I<sub>4sub>-I<sub>5sub>=0 C、I<sub>1sub>-I<sub>2sub>+ I<sub>3sub> + I<sub>4sub> +I<sub>5sub>=0 D、I<sub>1sub>-I<sub>2sub> + I<sub>3sub>-I<sub>4sub> + I<sub>5sub>=0
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。
<img src="https://img.ppkao.com/2018-09/tangxueping/2018092817031193342.jpg" />
A、i=ω<sub>1sub>/ω<sub>2sub> B、i=Z<sub>2sub>/Z<sub>1sub> C、i=n<sub>1sub>/n<sub>2sub> D、i=d<sub>2sub>/d<sub>1sub>