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答案来源:www.ybaotk.com电路原理ⅡX《电路原理》在线平时作业3
1.[单选题] <div>图中<span>t</span><span>³</span>0时<span>i<sub>L</sub>(t) 为(<span> )</span>。</span></div><div>A i<sub>L</sub>(t)=3-3e<sup>-4t </sup><span> B i<sub>L</sub>(t)=3+3e<sup>-4t</sup> C </span>其它</div><div><img height="229" width="291" alt="" src="http://file.open.com.cn/ItemDB/88702/3c3b6f30-ed37-4737-aa9f-bd2a0ffa47e7/2011128111928681.JPG" /></div>
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说明
A.A
B.B
C.C
D.D
答:——B——
2.[单选题] <div align="left">图中所示电路<span>C=0.1F,R=10</span><span>Ω</span>,求冲击响应<span>i为(<span> </span>) </span>。</div><div align="left"> </div><div>A 0.1<span>d</span>(t)-0.1e<sup>-t</sup>1(t)A<span> B -0.1e<sup>-t</sup>1(t)A C</span>其它</div><div><img alt="" width="202" height="122" src="http://file.open.com.cn/ItemDB/88702/312bac90-d018-482a-b489-7ba3ba1b438b/201112992414229.JPG" /></div>
A.A
B.B
C.C
D.D
答:——A——
3.[单选题] <div>如图理想变压器的电压方程为<span>(<span> )</span>。</span></div><div>A u<sub>1</sub>=nu<sub>2 </sub>,<span> B u<sub>1</sub>=-nu<sub>2 </sub>, C </span>其它</div><div></div><div><img style="WIDTH: 194px; HEIGHT: 106px" height="226" width="369" alt="" src="http://file.open.com.cn/ItemDB/88702/270dd319-379b-4e2d-949d-517aad98b68a/201112792128815.JPG" /></div>
A.A
B.B
C.C
D.D
答:——A——
4.[单选题] <div align="left">8-1 图中所示电路<span>L=0.2H,R=2</span><span>Ω</span>,求冲击响应<span>i为(<span> </span>) </span>。</div><div align="left"> </div><div>A 5e<sup>-t</sup>1(t)A<span> B 0 C</span>其它</div><div><img alt="" width="202" height="122" src="http://file.open.com.cn/ItemDB/88702/09a8c6fb-3dad-4685-8541-2e7b761a80af/201112992157242.JPG" /></div>
A.A
B.B
C.C
D.D
答:————
5.[单选题] <div>图中,<span>L=20mH, C=50pF, R=1k</span><span>W</span>, Ù=10<span>Ð</span>0<sup>0</sup> V。求电路的电流<span>I为 (<span> ) mA </span>。</span></div><div>A I=<span>¥</span><sup><span> </span></sup><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:————
6.[判断题] <div align="left">己知:<span>U</span>S=10V,R3=1Ω,R1=2Ω,R2=7Ω. 则<span>c点的电位</span>U<sub>c</sub>=-7V。<span>(<span> )</span></span></div><div align="left"><span><span><img style="WIDTH: 152px; HEIGHT: 102px" height="209" width="254" alt="" src="http://file.open.com.cn/ItemDB/88702/1715bacc-3a9e-4b80-897e-ab1435b30eaf/2011124152659102.JPG" /></span></span></div>
A.错误
B.正确
答:————
7.[判断题] <div align="left">R=15<span>Ω</span>, <span>L=0.3mH, C=0.2mF,U=5V,f=3</span><span>*</span>10<sup>4</sup>Hz .电流i=0.3Sin(18.8495t-34<span>°</span>)A <sub> </sub>。(<span><span> </span>)</span></div><div align="left"><span></span></div><div align="left"><span><img alt="" width="255" height="166" src="http://file.open.com.cn/ItemDB/88702/073de356-97d6-4bd9-b887-6f07bcf59451/20111269713662.JPG" /></span></div> 四川大学答案 q7 6 1 2 9 6 0 2 1
A.错误
B.正确
答:————
8.[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:————
9.[判断题] <div align="left">图中电位<span>U</span><sub>e</sub>=4V 。<span>(<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/d3bc2798-6db1-469a-89ec-b0fd7c6eaf9b/2011125102932161.JPG" /></span></span></div>
A.错误
B.正确
答:————
10.[判断题] <p>己知:<span>U</span>S=10V,R3=1Ω,R1=2Ω,R2=7Ω. 则<span>b点的电位</span>U<sub>b</sub>=9V。<span>(<span> )</span></span></p><p><span><span><img style="WIDTH: 137px; HEIGHT: 101px" height="209" width="254" alt="" src="http://file.open.com.cn/ItemDB/88702/e1633de7-d212-4961-828c-60e376985789/2011124152526506.JPG" /></span></span></p>
A.错误
B.正确
答:————
11.[判断题] 换路定律是指换路瞬间电容电压与电感电流不跳变,即uC(0+)=uC(0-)和iL(0+)=iL(0-)。( )
A.错误
B.正确
答:————
12.[判断题] 滤波器是利用电感和电容的频率特性实现滤掉某些频率波形的设备。( )
A.错误
B.正确
答:————
13.[判断题] Z21等于双口网络输出端短路时的转移阻抗。( )
A.错误
B.正确
答:————
14.[判断题] 非正弦电路的谐波阻抗是随着谐波的频率不同而变化的。( )
A.错误
B.正确
答:————
15.[判断题] <div align="left">图中<span>I<sub>3</sub>=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:————
16.[判断题] <div align="left">图中电位<span>U<sub>c</sub>=12V。(<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/d05aa13e-8644-4862-aa55-4a4316a93262/2011125103041570.JPG" /></span></span></div>
A.错误
B.正确
答:————
17.[判断题] <div align="left">电路中的开关断开已经很久,<em>t</em>=0时闭合开关,电流i<sub>1</sub>(0)=1A 。(<span> )</span></div><div align="left"> <img height="156" width="324" alt="" src="http://file.open.com.cn/ItemDB/88702/32b0cb26-3083-436e-b92c-78d3fe8431db/2011128112628710.JPG" /></div>
A.错误
B.正确
答:————
18.[判断题] <div align="left">图中<span> U</span><sub>S</sub>=10V, R=10Ω, I<sub>S</sub>=-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:————
19.[判断题] <div align="left">已知 R<sub>1</sub>=<span>R</span><sub>2</sub>=1Ω, <span>L</span><sub>1</sub>=1H, <span>C=1</span>F。若激励是 <span>d</span>(<span>t)</span>,响应是u<sub>2</sub>(<span>t)</span>,网络函数H(S)=1/(S<sup>2</sup>+2S+2)(<span><span> </span>)。</span></div><div align="left"> <img height="179" width="330" alt="" src="http://file.open.com.cn/ItemDB/88702/0d102e5a-530c-4612-84e1-4fa5c3c719d7/201112993223320.JPG" /></div>
A.错误
B.正确
答:————
20.[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<sub>C</sub>(0)=4V 。<span>(<span> )</span></span></div><div align="left"><span><span><img height="205" width="372" alt="" src="http://file.open.com.cn/ItemDB/88702/75efb68a-b38b-4dde-9318-da1e3269f61b/2011128112922153.JPG" /></span></span></div>
A.错误
B.正确
答:————
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答案来源:www.ybaotk.com |
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