范世贵-电路基础2版-答案(第5章).docx

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1、窗体顶端                  第五章      正弦稳态分析窗体底端5-1    已知、。试写出相量、，写出相量图，求相位差。  　答案    解：　                   图  题5-1                                                                 相量图如图5-1所示。5-2  已知、。试写出他们所代表正弦电流的时域表达式，画出相量图，并求相位差。     　答案    解：                  图

2、  题5-2                         　                                                                相量图如图5-2所示。5-3   已知，。求的时域表达式。　答案      解：                                                                                              。5-4   图题5-4所示电路，已知电压表、的读数分

3、别为3V,4V。求电压表V的读数。                                                  图    题5-4　答案                                                                                       解： (a)5-5   图题5-5所示电路，已知电流表、的读数均为10A。求电流表A的读数。                                             

4、                            图   题5-5　　答案      解：设，则         (a)。                        A的读数为                          A的读数为0。5-6   图题5-6所示正弦稳态电路，已知电压表、、的读数分别为３０V、60V、100V。求电压表V的读数。                                             图    题5-6        　　答案      解：设 

5、，则                                 电压表的读数为50V．　5-7     图题5-7所示正弦稳态电路，已知电流表、、的读数分别为5A、3A、4A．求的读数。                   图    题5-7　答案　　                                                                                                    解：  设，则：                    

6、                                      　即：的读数为8A或0。   5-8  求图题5-8所示电路中电压表V的读数。                                                                                                       图    题5-8　答案      解：设，则                 即V的读数为30V。                 即V的读数为70V。

7、                                           即V的读数为50V。　   　　                   5-9  求图题5-9所示电路中电流表A的读数.。                              图    题5-9　答案     解:      则                                                     即:电流表的读数为5A或1A。                              

8、                                                                                  5-10   图题5-10所示电路,,求。                                   图    题5-10　答案      解: