电工技术参考答案

电工技术作业答案 作业1答案 1-1


（发出）
（吸收）
（吸收）
（功率平衡）该支路吸收电能 1-2 (1)


(2)
(3)
1-3 (a)

(b)

1-4
1-5 S断开时
S闭合时

作业2答案 2-1


代入数据解方程可得，
=
,
A 2-2

代入数据解方程可得
-0.5A
3.5V 2-3 略 2-4
0A 2-5该电路中只有两个结点，选左边结点为参考结点，结点电压方程如下：
再根据KVL可得三个电流
A  EMBED Equation.3 
 A  EMBED Equation.3 
A 2-6 将10 EMBED Equation.3 
支路断开，左边回路电流为 EMBED Equation.3 
 EMBED Equation.3 
 右边回路电流为  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 2-7 （a）  EMBED Equation.3 
  EMBED Equation.3 
 (b)  EMBED Equation.3 
  EMBED Equation.3 
 作业3答案 3-1  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 3-2  EMBED Equation.3 
 EMBED Equation.3 
  EMBED Equation.3 
 3-3  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 3-4 EMBED Equation.3 
 EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 EMBED Equation.3 
 3-5  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 3-6  EMBED Equation.3 
 EMBED Equation.3 
 3-7  EMBED Equation.3 
 EMBED Equation.3 
=3.79 EMBED Equation.3 
 作业4答案 4-1 略 4-2 略 4-3 相电压: EMBED Equation.3 
 电流和线电流: EMBED Equation.3 
 4-4 (1)各相电流分别为: EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 中线电流为三个相电流的和:  EMBED Equation.3 
 (2) EMBED Equation.3 
  EMBED Equation.3 
 EMBED Equation.3 
  EMBED Equation.3 
  EMBED Equation.3 
 (3)U相负载的电压和电流均为0，V相负载的电压为 EMBED Equation.3 
 V相负载和W相负载