阻抗喊丛 Z = U / I = 220 / 5。5 = 40 欧 相位差世兆 y = 43 - (- 10) = 53 度 cosy = cos53 = 0.6 R = cosy * Z = 24 欧郑返樱 X = cosy * Z = 32 欧 P = I * I * R = 5.5 * 5.5 * 24 = 726 W Q = I * I * X = 5.5 * 5.5 * 32 = 968 var