已知二端网络的关联的端口电压和端口电流分别为u(t)=10cost (v),i(t)=5cos(t+60°) (A), 则二端网络吸收的平均功率为( )W。
发布时间:2024-09-21
A.5
B.10
C.12.5
D.15
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