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作业帮 发表于 2020-9-10 08:44:58

东大20秋学期《电路原理》在线平时作业2题目

20秋学期《电路原理》在线平时作业2
1.[单选题] <div>电路图中的时间常数为<span>(<span>      )</span>。</span></div><div>A <span>t</span> =10^-5<span>          B </span><span>t</span> =10<span>            C </span>其它</div><div><img height="243" width="355" alt="" src="http://file.open.com.cn/ItemDB/88702/02433072-a314-4d1b-942d-93e6604c7afa/2011128111550830.JPG" /></div>
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    A.A
    B.B
    C.C
    D.D
    答:——A——
2.[单选题] <div>如图空心变压器的输出的特性方程为<span>(<span>      )</span>。</span></div><div>A u₂=L₁(di₂/dt)-M(di₁/dt),   B u₂=L₂(di₂/dt)-M(di1₂/dt),   C 其它</div><div></div><div><img style="WIDTH: 171px; HEIGHT: 115px" height="415" width="643" alt="" src="http://file.open.com.cn/ItemDB/88702/948c67ff-494d-4ffe-8e60-223e65cade26/201112791947501.JPG" /></div>
    A.A
    B.B
    C.C
    D.D
    答:——B——
3.[单选题] <div>图中，<span>L=20mH, C=50pF, R=1k</span><span>W</span>, &Ugrave;=10<span>&ETH;</span>0⁰ V。电路的谐振频率<span>w</span>₀为<span>(<span>       )</span>弧度/秒 。</span></div><div>A 10^{6<span>   </span>其它}      B 159155       C </div><div></div><div><img height="102" width="134" alt="" src="http://file.open.com.cn/ItemDB/88702/bff4af68-3902-4a41-9709-bb8b45d899c1/201112792625588.JPG" /></div>
    A.A
    B.B
    C.C
    D.D
    答:——A——
4.[单选题] <div>图中，<span>L=20mH, C=50pF, R=1k</span><span>W</span>, &Ugrave;=10<span>&ETH;</span>0⁰ V。求电路的电流<span>I为 (<span>      ) mA </span>。</span></div><div>A I=<span>&yen;</span>^{<span>   </span>}<span>      B I=10       C </span>其它</div><div></div><div><img height="102" width="134" alt="" src="http://file.open.com.cn/ItemDB/88702/d0c3fdc0-4970-4faf-a570-0ff90e197461/201112793159643.JPG" /></div>
    A.A
    B.B
    C.C
    D.D
    答:————
5.[单选题] <div>图中<span>t</span><span>&sup3;</span>0时<span>i_L(t) 为(<span>      )</span>。</span></div><div>A i_L(t)=3e^-4t<span>    B i_L(t)=3-3e^-4t    C </span>其它</div><div><img height="214" width="324" alt="" src="http://file.open.com.cn/ItemDB/88702/9fc324a9-266f-4a36-8cf1-c0cea1adc304/201112811174784.JPG" /></div>
    A.A
    B.B
    C.C
    D.D
    答:————
6.[判断题] 正弦电路的平均功率P=UIcosj。(         )
    A.错误
    B.正确
    答:————    东财答案q16478616401 或请进 ap5u.com
7.[判断题]Y22等于双口网络输入端开路时的输出导纳。 (      )N
    A.错误
    B.正确
    答:————
8.[判断题] <div>己知：<span>U</span>_S=30V,R₃=1&Omega;,R₁=2&Omega;,R₂=7&Omega;. 则电压U_ab=-30V。<span>(<span>       )</span></span></div><div><span><span></span></span></div><div><span><span><img style="WIDTH: 170px; HEIGHT: 121px" height="209" width="254" alt="" src="http://file.open.com.cn/ItemDB/88702/f4d32a8c-379b-4db3-8339-6fd0622d9461/2011124153037391.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
9.[判断题] <div>己知：<span>U</span>S=30V,R₃=1&Omega;,R₁=2&Omega;,R₂=7&Omega;. 则电压U_co=21V。<span>(<span>       )</span></span></div><div><span><span></span></span></div><div><span><span><img style="WIDTH: 175px; HEIGHT: 132px" height="209" width="254" alt="" src="http://file.open.com.cn/ItemDB/88702/38c9abf6-9781-4137-951b-6753c7366c40/2011124153251161.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
10.[判断题] <div align="left">图示电路，t=0 时将开关<span>K闭合</span>，<span>t<0</span>时电路已达稳态，电压u₁(0)=10 。<span>(<span>      )</span></span></div><div align="left"> <img height="179" width="347" alt="" src="http://file.open.com.cn/ItemDB/88702/099834b6-aab4-4098-bf4a-e7c4d61d3c98/2011128112423597.JPG" /></div>
    A.错误
    B.正确
    答:————
11.[判断题] <div align="left">图中<span> U</span>_S=10V, R=10&Omega;, I_S=-1A。则电压<span>U=0V 。(<span>       )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="177" width="255" alt="" src="http://file.open.com.cn/ItemDB/88702/640b4b05-1d11-44a5-9d3e-e304477ff20d/201112415499864.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
12.[判断题] <div align="left">电路如图所示， <span>t<0</span>时电路已达稳态，t=0时开关<span>Ｋ由①扳向②，电压</span>u_R(0)=0V 。<span>(<span>      )</span></span></div><div align="left"><span><span><img height="205" width="372" alt="" src="http://file.open.com.cn/ItemDB/88702/cf71e4d9-887a-45fc-9513-a9591e2532fd/2011128113057141.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
13.[判断题] <div align="left">己知：<span>U</span>_S=20V,R₃=1&Omega;,R₁=2&Omega;,R₂=7&Omega;. 则U_S的输出功率为<span>40W。(<span>      )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img style="WIDTH: 162px; HEIGHT: 107px" height="209" width="254" alt="" src="http://file.open.com.cn/ItemDB/88702/6246ac65-7db3-475f-ba70-f8e93077b3a5/2011124152929185.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
14.[判断题] <p>对称三相电源线电压为<span>380V，Z=6+<span>j4</span></span><span>W</span>， <span>Z</span>_l =2+<span>j2</span><span>W</span>。则负载<span>Z的相电流I_P=22A。（<span>       </span>）</span></p><p><span></span></p><p><span><img height="206" width="272" alt="" src="http://file.open.com.cn/ItemDB/88702/9cbdee05-4fdb-406c-a34f-eb1e24aec5bc/201112695411327.JPG" /></span></p>
    A.错误
    B.正确
    答:————
15.[判断题] <div align="left">图示电路，t=0 时将开关<span>K闭合</span>，<span>t<0</span>时电路已达稳态，电流i₁(0)=5 mA 。(<span>      )</span></div><div align="left"> <img height="179" width="347" alt="" src="http://file.open.com.cn/ItemDB/88702/83e3c5e9-bd24-4bc3-9f7e-029eebd7b9fe/201112811225561.JPG" /></div>
    A.错误
    B.正确
    答:————
16.[判断题] <div align="left">图中电位<span>U_d=4V 。(<span>      )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="212" width="350" alt="" src="http://file.open.com.cn/ItemDB/88702/b9f7cdc6-2055-499d-b82d-3a0468ba7c8a/2011125102224473.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
17.[判断题] 串联谐振时，电感电压和电容电压相等UL=UC，外加电压等于电阻电压U=UR。(      )
    A.错误
    B.正确
    答:————
18.[判断题] <div align="left">图中<span>I₃=1A</span>。<span>(<span>      )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="240" width="413" alt="" src="http://file.open.com.cn/ItemDB/88702/547eb257-c3bf-4ec8-8453-030fc5108b92/2011125103143525.JPG" /></span></span></div>
    A.错误
    B.正确
    答:————
19.[判断题] <div align="left">图中<span> R</span>₁=6&Omega;, R₂=4 &Omega;, R₃=3 &Omega;, U_S1=12V, U_S2=24V。则电流<span>I</span>₄=2A,(<span>      )</span></div><div align="left"><span></span></div><div align="left"><span><img height="177" width="344" alt="" src="http://file.open.com.cn/ItemDB/88702/57516a17-b6dd-4d79-896a-381102544518/2011124154028972.JPG" /></span></div>
    A.错误
    B.正确
    答:————
20.[判断题] <div align="left">图中<span> R</span>₁=6&Omega;, R₂=4 &Omega;, R₃=3 &Omega;, U_S1=12V, U_S2=24V。则电流<span>I</span>₁=2A.(<span>      )</span></div><div align="left"><span></span></div><div align="left"><span><img style="WIDTH: 216px; HEIGHT: 135px" height="177" width="344" alt="" src="http://file.open.com.cn/ItemDB/88702/a7e24506-d0fa-4118-9c51-96843d0062a2/2011124153614308.JPG" /></span></div>
    A.错误
    B.正确
    答:————

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