R = 302 Ω XL = ω * L = 2 * π * f * L= 2 * 3.14 * 50 * 1.66 = 521.24 Ω
Z = (R^2 + XL^2)^0.5 = 602.4 Ω
1.I = U / Z = 220 / 602.4 = 0.3653 A
2.S = U * I = 220 * 0.3653 = 80.366 VA
3.P = I * I * R = 40.3 W
4.Q = ( S^2 - P^2)^0.5 = 69.53 Var
5.ψ = P / S = 0.501电流 I=u/r=220v/302 Ω=0.73A 对不对？不对！因为电路中不仅有电阻R，还有感抗XL，所以 I=U/ Z弱弱的问：什么是感抗？？Z是什么？嘻嘻@@俺是文科生@绕呀