① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/5F931CE6FE3F3703B2BFEF357DAD2B21.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(20-j40)VA/>
② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/DB777B73C24D41B286D5E026FC00C8D6.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(20+j40)VA/>
③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/819522447EA95D8DB3A83DC72EC3A361.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(40-j20)VA/>
④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D9CE7A72F664633AC68008A7A39F9B30.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(40+j20)VA/>