更多“ 求如图所示电路的等效电阻R<sub>ab</sub>。<br /> <img src="https://nimg.ppkao.com/2019-05/leiyawen/2019051609230529712.jpg?sign=02842d52e90d1b3a911fb36a3bf724e7&t=62d5a6c0" />”相关的问题
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、充电式延时电路如图所示，其中E<sub>csub>＝18V，U<sub>Vsub>＝10V，C＝47μF，若要使该电路延时1s，试求充电电阻R<sub>2sub>的值。rc="https://img.ppkao.com/2018-09/tangxueping/2018093015351571478.jpg" />
A、如图所示电路中，u<sub>Ssub>=10sin314tV，R<sub>1sub>=2Ω，R<sub>2sub>=1Ω，L=637mH，C=637μF，求电流i<sub>1sub>，i<sub>2sub>和电压u<sub>csub>。rc="https://img.ppkao.com/2018-09/tangxueping/2018092818010827576.jpg" />
A、求图所示电路在开关S打开和闭合两种情况下的等效电阻R<sub>absub>。rc="https://img.ppkao.com/2019-04/wangxuan/2019042616331161571.jpg" />
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