有两个交流电e1=Esin(ωt+2π/3),e2=Esin(ωt)迭加后表示为() A: 1.414Esin(ωt+π/6), B: e=Esin(ωt+π/3) C: e=2Esin(ωt) D: e=1.732Esin(ωt+π/6),
有两个交流电e1=Esin(ωt+2π/3),e2=Esin(ωt)迭加后表示为() A: 1.414Esin(ωt+π/6), B: e=Esin(ωt+π/3) C: e=2Esin(ωt) D: e=1.732Esin(ωt+π/6),
载波为Esinωt的电桥,当单臂输入调制信号ε(t)=AsinΩt时,其输出调幅波的幅值为()。(Ω
载波为Esinωt的电桥,当单臂输入调制信号ε(t)=AsinΩt时,其输出调幅波的幅值为()。(Ω
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