《电路及磁路(专科)》武汉理工大学20春作业二
电路及磁路(专科)-作业二1.[判断题] 回路电流法是只应用基尔霍夫第二定律对电路求解的方法。
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A.正确
B.错误
正确答案:——B——
2.[判断题] 理想电压源和理想电流源不可以进行等效变换。
A.正确
B.错误
正确答案:——A——
3.[判断题] 零输入响应是指电路中所有动态元件初始储能为零，由于外加激励所引起的响应。
A.正确
B.错误
正确答案:——A——
4.[判断题] 并联电路中，在电阻最小的支路上，消耗的电功率也最小。
A.正确
B.错误
正确答案:————
5.[判断题] u,i取非关联参考方向，则乘积-ui表示元件发出的功率。
A.正确
B.错误
正确答案:————
6.[判断题] 在电路等效变换时，如果一条支路的电流为零，可按短路处理。
A.正确
B.错误
正确答案:————
7.[判断题] 回路电流方程是用回路电流表示的KVL方程,结点电压方程是用结点电压表示的KCL方程。
A.正确
B.错误
正确答案:————
8.[判断题] 单位阶跃函数除了在t=0处不连续，其余都是连续的。
A.正确
B.错误
正确答案:————
9.[判断题] 非关联参考方向是指电流的实际方向与参考方向相反。
A.正确
B.错误
正确答案:————
10.[判断题] 任何电路都可以应用叠加定理来求解未知电压、电流量。
A.正确
B.错误
正确答案:————
11.[判断题] 支路电流法和回路电流法都是为了减少方程式数目而引入的电路分析法。
A.正确
B.错误
正确答案:————
12.[判断题] 在一阶电路中，时间常数越大，则过渡过程时间越长。
A.正确
B.错误
正确答案:————
13.[判断题] 串联电路中，电阻大者，其消耗的电功率也大。
A.正确
B.错误
正确答案:————
14.[判断题] 叠加定理只适合于直流电路的分析。
A.正确
B.错误
正确答案:————
15.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">若某元件的u-i特性曲线在任何时刻如图2-2所示，则此元件为</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">( )</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="185" height="132" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl02.files/dlycl02-3429.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.线性、非时变电阻
B.线性、时变电阻
C.非线性、时变电阻
D.非线性、非时变电阻
正确答案:————
16.[单选题] 应用叠加定理，理想电压源不作用时视为 。
A.短路
B.开路
C.电阻
D.理想电流源
正确答案:————
17.[单选题] 在换路瞬间，下列说法中正确的是 。
A.电感电流不能跃变
B.电感电压必然跃变
C.电容电流必然跃变
D.电容电压必然跃变
正确答案:————
18.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">图2-2所示电路的工作情况是</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="215" height="142" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-3455.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.电压源发出功率
B.电流源发出功率
C.电压源和电流源都发出功率
D.电压源和电流源都发出功率
正确答案:————
19.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图2-6所示电路的转移电压比</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="39" height="42" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-5895.png"></span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">应为</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="200" height="212" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-5906.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.-1
B.1
C.2
D.3
正确答案:————
20.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图所示电路中，电路的独立KCL方程数为</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="117" height="111" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl04.files/dlycl04-6886.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.1
B.2
C.3
D.4
正确答案:————
21.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:justify; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图2-3所示的二端电路中与理想电压源并联的电阻R</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">( )</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="198" height="156" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl02.files/dlycl02-3924.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.对端口电压有影响
B.对端口电流有影响
C.对US支路的电流有影响
D.对端口电压与端口电流均有影响
正确答案:————
22.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:justify; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">图所示电路转移电压比U</span><span style="font-size:12.0000pt; font-family:'宋体'; vertical-align:sub; ">O</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">/U</span><span style="font-size:12.0000pt; font-family:'宋体'; vertical-align:sub; ">I</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">应为</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">( )</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="225" height="128" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl02.files/dlycl02-7408.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.－1
B.1
C.2
D.3
正确答案:————
23.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-autospace:ideograph-numeric; text-autospace:ideograph-other; line-height:150%; vertical-align:; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">图所示电容元件的V，则等于</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-autospace:ideograph-numeric; text-autospace:ideograph-other; text-align:center; line-height:150%; vertical-align:; "><span style="font-size:10.5000pt; font-family:'Times New Roman'; "><img width="91" height="124" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-6412.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-autospace:ideograph-numeric; text-autospace:ideograph-other; line-height:150%; vertical-align:; "><span style="font-size:10.5000pt; font-family:'Times New Roman'; "><img width="46" height="38" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-6415.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="23" height="42" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-6424.png"></span> <o:p></o:p>
B.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-autospace:ideograph-numeric; text-autospace:ideograph-other; line-height:150%; vertical-align:; "><span style="font-size:10.5000pt; font-family:'Times New Roman'; "><img width="64" height="36" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-6430.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
C.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-autospace:ideograph-numeric; text-autospace:ideograph-other; line-height:150%; vertical-align:; "><span style="font-size:10.5000pt; font-family:'Times New Roman'; "><img width="73" height="38" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-6433.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
D.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-autospace:ideograph-numeric; text-autospace:ideograph-other; line-height:150%; vertical-align:; "><span style="font-size:10.5000pt; font-family:'Times New Roman'; "><img width="89" height="37" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-6436.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
正确答案:————
24.[单选题] 必须设立电路参考点后才能求解电路的方法是 。
A.支路电流法
B.回路电流法
C.结点电压法
D.以上答案都不是
正确答案:————
25.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">电路图如图3所示，已知</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="61" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-6711.png"></span>，<span style="font-size:12.0000pt; font-family:'宋体'; "><img width="73" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-6753.png"></span>，<span style="font-size:12.0000pt; font-family:'宋体'; "><img width="77" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-6795.png"></span>，<span style="font-size:12.0000pt; font-family:'宋体'; "><img width="74" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-6837.png"></span>，则流过R3上的电流i为<span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="285" height="142" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-6859.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.0.3A
B.0.6A
C.0.4A
D.0.2A
正确答案:————
26.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图2-4所示电路的等效电导G为</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="296" height="95" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-4948.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="41" height="39" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-4951.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
B.6S
C.27S
D.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="37" height="41" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-4963.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
正确答案:————
27.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">某电路的图如图5所示，则下面哪个不是它的树_________</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="154" height="140" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-7268.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.（1,7,6,9）
B.（2,3,1,8）
C.（8,9,4,6）
D.（2,3,4,6）
正确答案:———— 无忧答案网q76129 6021
28.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">电路如图2所示，则该电路的输入阻抗为</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="215" height="134" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-6210.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.1Ω
B.2Ω
C.3Ω
D.4Ω
正确答案:————
29.[单选题] 对于一阶电路的过渡过程，实际工程计算中，一般认为从换路开始经过 时间，就认为过渡过程已经结束
A.τ
B.2τ
C.20τ
D.3τ~5τ
正确答案:————
30.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图3所示，电路Rab为_________。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="271" height="145" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-6271.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">18</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-6276.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
B.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; ">9</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-6280.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
C.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; ">3</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-6284.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
D.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; ">2</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-6288.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
正确答案:————
31.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:left; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">图2-1所示电路中，当R2增大时，电流源I</span><span style="font-size:12.0000pt; font-family:'宋体'; ">S</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">两端电压U将</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="199" height="164" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-2982.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.不变
B.降低
C.升高
D.以上都不是
正确答案:————
32.[单选题] 两个电阻串联，R1：R2=1：2，总电压为60V，则U1的大小为 。
A.10V
B.20V
C.30V
D.40V
正确答案:————
33.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">在图2-6所示电路中,I</span><span style="font-size:12.0000pt; font-family:'宋体'; vertical-align:sub; ">X</span><span style="font-size:12.0000pt; font-family:'宋体'; ">为</span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">( )</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="252" height="144" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl02.files/dlycl02-5396.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.2A
B.5A
C.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="30" height="42" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl02.files/dlycl02-5407.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
D.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="27" height="42" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl02.files/dlycl02-5410.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
正确答案:————
34.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图7所示，用节点电压求出A点的电位为_________。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="158" height="160" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-8272.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; ">7</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-8276.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
B.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">8.4</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-8282.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
C.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">11</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-8287.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
D.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">13.2</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-8294.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
正确答案:————
35.[单选题] 已知接成Y形的三个电阻都是30Ω，则等效Δ形的三个电阻阻值为 。
A.全是10Ω
B.两个30Ω一个90Ω
C.全是90Ω
D.不确定
正确答案:————
36.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">在图<font face="Times New Roman">2</font><font face="宋体">电路中，电流源的功率为</font></span><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'Times New Roman'; ">______</span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="254" height="128" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-5788.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.吸收6W
B.发出6W
C.吸收4W
D.发出4W
正确答案:————
37.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图2所示，电流源的功率为</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="175" height="187" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl06.files/dlycl06-7338.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.吸收12W
B.吸收48W
C.发出12W
D.发出48W
正确答案:————
38.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图6所示，化简后Us和Ro分别为_________。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="284" height="156" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-7774.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">12V,9</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-7782.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
B.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">9V,5</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-7789.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
C.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">12V,3</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-7797.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
D.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">6V,2</span><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl05.files/dlycl05-7804.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
正确答案:————
39.[单选题] <p class="p0" style="margin-bottom:0pt; margin-top:0pt; line-height:150%; "><span style="mso-spacerun:'yes'; font-size:12.0000pt; font-family:'宋体'; ">如图2-3所示电路中a、b端的等效电阻Rab为</span><span style="mso-spacerun:'yes'; text-decoration:underline ;font-size:12.0000pt; font-family:'宋体'; "> </span><span style="font-size:12.0000pt; font-family:'宋体'; ">。</span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
<p class="p0" style="margin-bottom:0pt; margin-top:0pt; text-align:center; line-height:150%; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="146" height="156" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-4473.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
A.R1+R2
B.<p class="p0" style="margin-bottom:0pt; margin-top:0pt; "><span style="font-size:12.0000pt; font-family:'宋体'; "><img width="47" height="39" src="http://wljy.whut.edu.cn//uploadfiles/word/dlycl01.files/dlycl01-4483.png"></span><span style="font-size:12.0000pt; font-family:'宋体'; "><o:p></o:p></span>
C.R1
D.R2
正确答案:————
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