A.124.12W
B.128.12W
C.145.28W
D.134.28W
[单选题]已知电流i=[10sinωt+3sin(3ωt+30°)]A,当它通过5Ω线性电阻时消耗的功率P为()W。A . 845B . 325C . 545D . 不确定
[单选题]已知电流i(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是()。A.电流i(t)与电压u(t)
[单选题]已知电流i(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是()。A.电流i(t)与电压u(t)
[单选题]已知电流/(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是()。A.电流/(t)与电压u(t)
[单选题]已知电流/(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是()。A.电流/(t)与电压u(t)
[单选题]在RLC串联电路中,已知R=10Ω,L=0.05H,C=50μF,电源电压为u(t)=20+90sin(ωt)+30sin(3ωt+45°)V,且电源
[单选题]题12图所示RLC串联电路中,已知R=10Ω,L=0.05H,C=50μF,电源电压为:u(t)=20+90sin(ωt)+30sin(3ωt+45°
[单选题]已知电流i(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是( )。[2014年真题]A.电流
[单选题]已知电流i(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是( )。[2014年真题]A.电流
[单选题]已知电流i(t)=0.1sin(ωt+10°)A,电压u(t)=10sin(ωt-10°)V,则如下表述中正确的是( )。[2014年真题]A.电流