在图10-69所示电路中，开关S在t=0瞬间闭合，若uC（0-）=5V，则uL（0+）=（）V。https://assets.asklib.com/psource/2015110114043515136.jpg

A . 126e-3 B . 126（1-e-3） C . 126（1+e-3） D . 4-3e-3

A . 1 B . 0.5 C . 2 D . 0.25

A . 3 B . 0 C . 6 D . -3

A .https://assets.asklib.com/psource/2015110111290284798.jpg B .https://assets.asklib.com/psource/201511011129155823.jpg C .https://assets.asklib.com/psource/2015110111293084231.jpg D .https://assets.asklib.com/psource/2015110111294629263.jpg

A . 0 B . 0.6 C . 0.3 D . 0.03

A . 与图示方向相同且逐渐增大 B . 与图示方向相反且逐渐衰减到零 C . 与图示方向相同且逐渐减少 D . 不确定

A . 2.5 B . -2 C . 2 D . -2.5

A . ['['L/R3B .https://assets.asklib.com/psource/2015110111201458733.jpg C .https://assets.asklib.com/psource/2015110111202959174.jpg D .https://assets.asklib.com/psource/201511011120497322.jpg

A . 0.1 B . 0.05 C . 0 D . 0.2

在图3.03中，开关S闭合前电路已处于稳态，试间闭合开关瞬间，电流初始值i(0+)为(1)1A;(2)0.8A;(3)0A <img src='https://img2.soutiyun.com/ask/2020-06-19/961426452083398.png' />

<img src='https://img2.soutiyun.com/ask/2020-06-17/961264067053561.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18495001-18498000/18496804/2015110114005030374.jpg' /> A．0 B． 0.6 C． 0.3 D． 0.03

<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111311967106.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111313843578.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111315151618.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111320582310.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111323019711.jpg' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18525001-18528000/18526549/201511011401317578.jpg' /> A．2.5 B． -2 C． 2 D． -2.5

在题6.8图所示电路中,求开关S闭合瞬间t(=0)电路小的电压u_C、u_L。 <img src='https://img2.soutiyun.com/ask/2020-10-07/970927159291421.png' />

在图II-4所示电路中，开关S断开前电路已稳定，t=0时，断开S，则响应iL为()。 <img src='https://img2.soutiyun.com/ask/2020-04-28/956919156585214.png' /> A.<img src='https://img2.soutiyun.com/ask/2020-04-28/956919169829195.png' /> B.<img src='https://img2.soutiyun.com/ask/2020-04-28/956919179530655.png' /> C.<img src='https://img2.soutiyun.com/ask/2020-04-28/956919190240181.png' />

电路如图所示，Is=3A，Us=18V，R1=3Ω，R2=6Ω，L=2H，在t＜0时电路已处于稳态。当t=0时开关S闭合，求t≥0时的i_L、u和i(t)。 <img src='https://img2.soutiyun.com/ask/uploadfile/5499001-5502000/c59f97db78e22204b83620ad1e292af9.jpg' />

图4-4所示电路,t=0时,开关S闭合,求v_c(t). <img src='https://img2.soutiyun.com/ask/2020-12-01/975674141499809.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18498001-18501000/18500204/2015110114043515136.jpg' /> A．0 B． -5 C． 5 D． 10

在图1-77所示电路中，已知U=12V，R1=6Ω，R2=2Ω，L=0.2H。当t=0时开关S闭合，把电阻R1短接，问短接后需经多少时间电流才达到4.5A。(在t<0时电路已达稳态。) <img src='https://img2.soutiyun.com/ask/2020-06-11/960742159191536.png' />