电工与电子技术 习题答案 第5章习题解.docx
(第5章习题解)一.逸鼻黑5.1C5.2A5.3A5.4A5.5A二、计算题5.6价;220=1,=Z55+j314O.3O35.7解:220A=2Z60A55÷j95.1P=3UlIltos=>×3802cos603=6S8W.后380338O3<,zac1.=31.=A=A=5.V5Z60A55÷j314×O.3O355÷j95.1P=3UlIlcos3×380x5.98cos601969W5.8(1)解:Z=-=484CP100/=0.45A484zN=°990”0i.=36.36A、1.=27.27A,ic=18.I8A*484/80484/60弋484/40n=36.36ZOo+27.27ZI2(T+18.18Z-I2(F=36.36-13.6+P3.6-9.09-j15.7=13.67+j7.9=15.8Z30oA以=380X4'80锄/80+484而484/40484/80+484/40I26.6V253.4V(4)UA=UC=380V