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>。r /> src="https://img.ppkao.com/2018-09/tangxueping/2018092818010827576.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>。r /> src="https://img.ppkao.com/2018-09/tangxueping/2018092818010827576.jpg" />
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>。r /> src="https://img.ppkao.com/2018-05/tangxueping/2018051015543465216.jpg" />
A、如图所示电路为何种电路?当输入信号u<sub>ssub>与U<sub>csub>的波形如图所示时,画出u<sub>osub>在加电容C前后的波形。r /> src="https://img.ppkao.com/2018-09/tangxueping/201809131005477043.jpg" />
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、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。r /> src="https://img.ppkao.com/2018-09/tangxueping/2018092817031193342.jpg" />
A、电路如图所示,已知ω=2rad/s,求电路的总阻抗Z<sub>absub>。r /> src="https://img.ppkao.com/2018-09/tangxueping/20180928175425355.jpg" />
A、判断如图所示电路的逻辑功能。若已知u<sub>Bsub>=-20V,设二极管为理想二极管,试根据u<sub>Asub>输入波形,画出u<sub>0sub>的输出波形。r /> src="https://img.ppkao.com/2019-04/wangjue/2019041612450841572.jpg" />
A、如图所示,已知u=U<sub>msub>sinωt  V,R,X<sub>Lsub>,X<sub>Csub>,电容电流大于电感电流,试画出电路中电压、电流的矢量图。src="https://img.ppkao.com/2018-09/wangjing/2018092909095681515.jpg" />