计算题：一台单相变压器，已知一次电压<img src="/Image1/84/843c21d90a0247f06661107b676c9b38.jpg" />＝220V，一次绕组匝数<img src="/Image1/8a/8ad0d8ed05af94abc400dcdd95ae36bc.jpg" />＝500匝，二次绕组匝数<img src="/Image1/54/544b545b9b2038d3b0b9f3502aeea817.jpg" />＝475匝，二次电流<img src="/Image1/34/345bd859f3053042a9d9cd43c00acd3a.jpg" />＝71.8A，求二次电压<img src="/Image1/3b/3b54b422a0cdfa4aafddfaae1dc76b7b.jpg" />及满负荷时的输出功率<img src="/Image1/f1/f1ee7d235fed58805199d1b5f6e4d5c6.jpg" />？