二端网络端电压U=50V,电流I=10A,电压与电流的相位差
=53.1°,其中二端网络的入端复阻抗Z=R+jX,求电阻R=( )。
发布时间:2026-01-24
A.-3Ω
B.3Ω
C.-4Ω
D.4Ω
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