試題詳解

1 如圖所示之電路，v_a =100sin  ωt V，v_b = 100sin(ωt − 120° )V ，v_c = 100sin( ωt − 240°)V，求其平均輸 出電壓為何？ 
(A)82.7 V
(B)92.7 V
(C)102.7 V
(D)112.7 V