并联电阻值R = 71//33 = 22.53Ω;容抗 Xc = 1/(2πfc) = 10^6/( 2 * 3.14 * 50 * 25 ) =127.39Ω;总阻抗 Z =√( R^2 + Xc^2 ) =√( 22.52^2 + 127.39^2 ) =129.37Ω;电流I =U/Z = 220/129.37 = 1.7 A;电阻总功率 P =I^2 * R = 1.7^2 * 22.53 =65.16 w;其中,71Ω功率为 65.16 * 33/104 = 20.68 w;33Ω功率为 65.16 - 20.68 =44.48 w 。注意,电容必须是无极性电容,且耐压至少为 400v 。