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說的通俗好懂點吧,平均功率=功/時間 功就是正弦曲線下的面積(可以積分求得),時間就是橫坐標. 按以上計算正弦交流電的平均功率為峰值的1/√2倍 有效電流與平均功率成正比.即:正弦交流電的有效值等於峰值的1/√2倍
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