求图所示电路a，b端的戴维南等效电路。

A . 2V，2Ω B . -2V，2Ω C . 4V，2Ω D . -4V，2Ω

A . 15 B . 10 C . 7 D . 12

A . 9V，2Ω B . 3V，4Ω C . 3V，6Ω D . 9V，6Ω

A . -j2 B . -j7.5 C . j7.5 D . j2

A . 6V，6Ω B . 6V，2Ω C . 12V，6Ω D . 12V，2Ω

A . A B . B C . C D . D

A .https://assets.asklib.com/psource/2015110110421527799.jpg B .https://assets.asklib.com/psource/2015110110423676835.jpg C .https://assets.asklib.com/psource/2015110110430151547.jpg D .https://assets.asklib.com/psource/2015110110431468616.jpg

A .https://assets.asklib.com/psource/2015102715442257377.jpg B .https://assets.asklib.com/psource/2015102715442535355.jpg C .https://assets.asklib.com/psource/2015102715442726007.jpg D .https://assets.asklib.com/psource/2015102715443096508.jpg

正弦交流电路如图所示，ωL₁=ωL₂=10Ω，ωM=5Ω，R₁=R₂=6Ω，<img src='https://img2.soutiyun.com/latex/latex.action' />。求ab端戴维南等效电路。 <img src='https://img2.soutiyun.com/ask/5499001-5502000/aff59642310f90114dbbfcbeb33286d3.jpg' />

<img src='https://img2.soutiyun.com/ask/5364001-5367000/141e918444705bf908f4558f3a17ec9f.jpg' />

如图12.4.3所示电路的戴维南等效电路参数u_oc=______，R_eq=______。 <img src='https://img2.soutiyun.com/ask/2020-01-13/947754393378863.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/17874001-17877000/17875143/2015110209075654816.jpg' /> A．15 B． 10 C． 7 D． 12

(a) 求图9-38所示RLC电路关于vi(t) 和v0(t) 之间的微分方程。 (b)假定vi(t)=e^-3tu(t)，利用单边拉普拉斯变换求t＞0时的v0(t)。 <img src='https://img2.soutiyun.com/ask/2020-09-16/969096595538533.png' />

图示电路中，N为含源线性电阻网络，其端口伏安特性曲线如图(b)所示，其戴维南等效电路参数为()。 A．Uoc=-12V，R0=-3Ω B．Uoc=-12V，R0=3Ω C．Uoc=12V，R0=3Ω D．Uoc=12V，R0=-3Ω <img src='https://img2.soutiyun.com/ask/uploadfile/2766001-2769000/efeb2fb9e7ac950f1ab146ca4df3e402.jpg' />

求图所示的含受控源电路中，R_L两端的电压U。 <img src='https://img2.soutiyun.com/ask/2020-03-09/952634038812525.jpg' />

A．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715442257377.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715442535355.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715442726007.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18087001-18090000/18087885/2015102715443096508.jpg' />

求图所示电路的微分方程。设输入为u₁(t)，输出为u₂(t)。 <img src='https://img2.soutiyun.com/ask/5523001-5526000/d863126170088b2673c4380cb6743e8b.jpg' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18363001-18366000/18363314/2015110109503376391.jpg' /> A．6V，6Ω B． 6V，2Ω C． 12V，6Ω D． 12V，2Ω

A．Ro=R1//R2 B．Ro=R1+R2 C．Ro=R1 D．Ro=R2

A．8V,11Ω B．24V,4Ω C．66V,11Ω D．16V,4Ω