正弦稳态电路分析
电阻压降有效值 UR = Uscosφ = 8 * √2/2 = 4√2 v；
R = UR^2/P = (4√2)^2/16 = 2Ω；
∵ cosφ = √2/2，tanφ = 1，
∴ Q = Ptanφ = P = 16 var = QL，则 Qc = 0，C = 0；
ZL = Rtanφ = R = 2Ω；L = ZL/ω = 2/2 = 1 H 。
电阻为 2Ω，电感为 1 亨利，电容不存在 。
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电阻压降有效值 UR = Uscosφ = 8 * √2/2 = 4√2 v；
R = UR^2/P = (4√2)^2/16 = 2Ω；
∵ cosφ = √2/2，tanφ = 1，
∴ Q = Ptanφ = P = 16 var = QL，则 Qc = 0，C = 0；
ZL = Rtanφ = R = 2Ω；L = ZL/ω = 2/2 = 1 H 。
电阻为 2Ω，电感为 1 亨利，电容不存在 。