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时间:2019-08-31
《电路分析试卷2(附答案)》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、学院、系专业班级学号姓名······························密································封·······························线···································学院学年第学期《电路分析》期末考试试卷年级专业(本试卷考试时间120分钟满分100分)题号一二三四总分复核得分得分阅卷人一、填空题(本大题共5小题,每空2分,共20分)1、一只标有额定电压20V、额定功率1W的灯泡。现接在10V的电源下使用,则其阻值为,实际电
2、流是,实际消耗的功率为。2、电流源IS=5A,r0=2Ω,若变换成等效电压源,则U=,r0=.3、b条支路、n个节点的电路,独立的KCL方程数等于,独立的个KVL方程数等于。4、三相四线制供电线路可以提供两种电压,火线与零线之间的电压叫做,火线与火线之间的电压叫做。5、正弦周期电流的有效值与最大值之间的关系是 。得分阅卷人二、判断题(正确打“√”,错误打“×”)(10分,每题2分)1、受控源与独立源一样可以进行电源的等效变换,变换过程中可以将受控源的控制量变异。 ()2、叠加定理适用于线性电路,电压、电流和功
3、率均可叠加。 ()3、应用叠加定理和戴维宁定理时,受控源不能与电阻同样对待。 ()4、电流表内阻越小,电压表内阻越大,测量越准确。()第5页,共4页学院、系专业班级学号姓名······························密································封·······························线···································5、含有L、C元件的正弦交流信号电路,若电路的无功功率Q=0,则可判定电路发生谐振。()得分阅卷人三、单项选
4、择题(每小题3分,共30分)1、一根粗细均匀的电阻丝,阻值为25Ω,将其等分成五段,然后并联使用,则其等效电阻是()A.1/25ΩB.1/5ΩC.1ΩD.5Ω2、两个同频率正弦交流电流i1、i2的有效值各为40A和30A。当i1+i2的有效值为10A时,i1与i2的相位差是()A.0OB.180O.C.90OD.270O3、在R、L、C串联电路中,当总电流与总电压同相时,下列关系式正确的是()A.ωL2c=1B.ωLC=1C.ω2LC=1D.ωLC2=14、图示单口网络的等效电阻等于()(A)2Ω(B)4Ω(C)6Ω(D)-2Ω5、图示电路
5、中电阻R吸收的平均功率P等于()(A)12.5W(B)16W(C)32W(D)25W6、示电路中电压等于()(A)4V(B)-4V(C)6V(D)-6V7、图示谐振电路的品质因()(A)0.01(B)1(C)10(D)1008、5F的线性电容的端口特性为_______(A)(B)(C)9、端口特性为的二端电路元件是_______元件(A)电感(B)电容(C)电阻第5页,共4页学院、系专业班级学号姓名······························密································封········
6、·······················线···································10、LC并联正弦电流电路中,则总电流为_______A。(A)8(B)5(C)4得分阅卷人四、计算题(每小题10分,共40分)1、计算图示电路中的电流和电压。2、计算图示电路的电压和第5页,共4页学院、系专业班级学号姓名······························密································封·······························线·······
7、····························3、用网孔分析法计算图示电路中的网孔电流和。4、图示正弦电流电路中,已知V,求电流和。第5页,共4页学院、系专业班级学号姓名······························密································封·······························线···································电路分析试卷B答案一、填空题(本大题共8小题,每空2分,共20分)1、400,0.025A,0.25W2
8、、10V,23、n-1,b-14、相电压,线电压5、二、判断题(正确打“√”,错误打“×”)(10分,每题2分)×××√√三、单项选择题(每小题4分,共40分)1.C2.B3.C
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