超前自学网《电路2388》18春在线作业2-0001
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B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/7167394e.JPG”></IMG>
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A:–2A,2A
B:2A,-2A
C:–2A,-2A
D:2A,2A
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/cfb5856e.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/dae5ae2b.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/4d446893.JPG”></IMG>
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/8374d1d0.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/05b391d3.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/a40eb273.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/91b96706.JPG”></IMG>
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/5151b516.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/ffc26e73.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/15850dc1.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/9f6d94dd.JPG”></IMG>
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A:4A
B:2A
C:-4A
D:-1A
图示电路中，属于线性电阻的伏安特性曲线是图
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D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/93704543.JPG”></IMG>
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A:10欧姆
B:20欧姆
C:4欧姆
D:5欧姆
电感是一种储能元件，因为其储存的能量W =（ ）。
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/638ce297.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/9a3631b8.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/83b49574.JPG”></IMG>
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A:20mW
B:50mW
C:100mW
D:300mW
三角形联结的对称三相电路线电流和相电流的关系为
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/e567c6d6.JPG”></IMG>
B:3V
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D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/faeda12d.JPG”></IMG>
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/a47f62a5.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/58822f18.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/36030ede.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/9fa69067.JPG”></IMG>
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/2ea56033.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061123/8643b6fa.JPG”></IMG>
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设R<sub>y</sub>为对称Y形电路中的一个电阻，则与其等效的△形电路中的每个电阻等于（ ）。
A:<img alt=”” src=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/645d1447.JPG” />
B:<img alt=”” src=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/b5d2bfe9.JPG” />
C:<img alt=”” src=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/608c1004.JPG” />
D:<img alt=”” src=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/987635ef.JPG” />
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A:0.75A
B:1.5A
C:2A
D:3A
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B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/22d2f800.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/1ed79309.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/3a01332c.JPG”></IMG>
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A:电感
B:电容
C:电阻
D:受控源
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A:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/613b1407.JPG”></IMG>
B:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/72a7cb4e.JPG”></IMG>
C:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/f3c5707a.JPG”></IMG>
D:<IMG SRC=”http://file.open.com.cn/Lms/ItemDBAttachments/image/singleselect/jiaoxuecd/20061016/c26cc6ff.JPG”></IMG>
线性电阻上电压u与电流i关系满足（ ）定律。
A:欧姆
B:电荷守恒
C:焦耳
D:库仑
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A:纯电阻性
B:电容性
C:电感性
D:电阻电感性
.独立电压源的电压可以独立存在，不受外电路控制；而受控电压源的电压不能独立存在，而受（ ）的控制。
A:独立源
B:流过其本身的电流
C:其它支路的电流或电压
D:与之串联或并联的元件
