【单选题】【消耗次数:1】
已知空间有a、b两点,电压Uab=10V,a点电位为Va=4V,则b点电位Vb为
6V
-6V
14V
2V
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相关题目
【单选题】 b两点,电压Uab=10V,a点电位为Va=4V,则b点电位Vb为。
①  6V
②  -6V
③  14V
④  -14V
【单选题】 已知有向图G=(V,E),其中V={V1,V2,V3,V4,V5,V6,V7},E={V1,V2V1,V3V1,V4V2,V5V3,V5V3,V6V4,V6V5,V7V6,V7},G的拓扑序列是( )。
①  V1,V3,V4,V6,V2,V5,V7
②  V1,V3,V2,V6,V4,V5,V7
③  V1,V3,V4,V5,V2,V6,V7
④  V1,V2,V5,V3,V4,V6,V7
【单选题】 图2所示电路中,已知V1的读数为3V,V2的读数为4V,则V3的读数为。
①  7V
②  -1V
③  1V
④  5V
【单选题】 图3所示电路中,已知V1的读数为3V,V2的读数为4V,则V3的读数为。
①  7V
②  -1V
③  1V
④  5V
【单选题】 图1所示电路中,已知V1的读数为3V,V2的读数为4V,则V3的读数为。
①  7V
②  -1V
③  1V
④  5V
【单选题】 设无向图G1 = áV1, E1?, 其中, V1 = {v1, v2, v3, v4, v5}, E1 = {(v1, v2), (v2, v3), (v3, v4), (v3, v3), (v4, v5)},则v2的邻域 N(v2)为:
①  {v1, v2, v3};
②  {v1, v3};
③  {v1, v2, v3, v4, v5};
④  {v2}。
【单选题】 设有向图D1 = áV3, E3?, 其中 V3 = {v1, v2, v3, v4, v5}, E3 = {áv1, v2?, áv2, v3?, áv3, v2?, áv4, v5?, áv5, v1?},则v2的闭邻域 N(v2)为:
①  {v1, v2, v3};
②  {v1, v3};
③  {v1, v2, v3, v4, v5};
④  {v2}。
【单选题】 设有向图D = áV, E?, 其中 V={v1, v2, v3, v4, v5}, E={áv4, v1?, áv1, v1?,áv1, v2?,áv1, v3?, áv3, v1?, áv5, v3?},则v1的邻域 N(v1) =
①  {v3, v4};
②  {v2, v3,v4};
③  {v1, v2, v3, v4};
④  {v2,v3}。
【单选题】 设有向图D = áV, E?, 其中 V={v1, v2, v3, v4, v5}, E={áv4, v1?, áv1, v1?,áv1, v2?,áv1, v3?, áv3, v1?, áv5, v3?},则v1的闭邻域 N(v1) =
①  {v3, v4};
②  {v2, v3,v4};
③  {v1, v2, v3, v4};
④  {v2,v3}。
【判断题】 c的电压为Va=-1V,Vb=-3.2V,Vc=-3.9V,其集电极管脚是a。
①  正确
②  错误
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