右圖中欲使喇叭獲得最大功率,則變壓器匝數(shù)比N2/N1為()
A.36:1 B.1:36 C.6:1 D.1:6
半波整流后的電流平均值Idc等于()
A.(1) B.(2) C.(3) D.(4)
A.10% B.1.414% C.14.14% D.28.28%