變壓器為10:1 故二次側為VI=15.6Sin(377t)V
Vav=15.6/pi =4.968
故選(A)
156*(1/10)=15.6
15.6*0.318=4.96近似5
49如右圖所示為理想變壓器電路,D為理想二極體,Vi =156 sin(377t..-阿摩線上測驗