图示正弦交流电路中，已知，则其有功功率P等于（ ）W。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/297055eb4b854f78a5b6c9da31135f38.png
举一反三
- 图示正弦交流电路中，已知，则其有功功率P等于250 W。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/222dfae6c3244a11858054fbeaa66b85.jpg
- 图示正弦交流电路中，已知，则其有功功率P等于（）W。http://image.z...a5b6c9da31135f38.png
- 图示正弦交流电路中，已知，R=10Ω，XL=30Ω则u2=（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/91a390e26d5f4862865205c44298df30.png
- 对称三相电路的有功功率的计算公式正确的是( )。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/3306ee5c6c384986b082f95c444c3e4d.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/d59fad97c5ea4de786230488e1333ec7.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/480713659b00439c983040f4d91364e9.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/c475fb2fc3494891960d403d1e6b92d0.png" />
- 图示正弦交流电路中，已知XL≠XC，则 电流i与电压u的相位关系是（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/36925fd56f1e45529d6d82b60ce12555.png