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电功率就是指在单位时间内电流所做的功,电功率用字母P表示。
A、对
B、错
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电功率
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通过一理想变压器,经同一线路输送相同电功率P,原线圈的电压U保持不变,输电线路的总电阻为R。当副线圈与原线圈的匝数比为K时,线路损耗的电功率为,若将副线圈与原线圈的匝数比提高到Nk,线路损耗胡电功率为,则和分别为()。
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