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
举一反三
- 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
- 对称三相电路的有功功率的计算公式正确的是( )。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/a26c625ab73e42f5a78b8508196d5a9b.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/2f416caa47f14f75800e6075973d66bc.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/d292883b6acf4df68954eceddbc4e7fd.png" />
- 在正弦交流电路中，电感元件伏安关系的瞬时值为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/1b1013118b784d798d1d5a125205d0c5.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/e7f2221252704dcf9cfc32d1b4629b02.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/13affa3040de451981d21fa5f1000459.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/953e302da4d5403e8444dd4f95ca0ac7.png" />
- 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
- 正弦交流电路中，若已知，则Z的性质为（00a000a000a000a000a0 ）性，其中R=（00a000a000a000a000a0 ）W，X=（00a000a000a000a000a0 ）W。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/ba647bc1463041f69867137dd0b8d532.jpg