問題詳情
45.如附圖所示為兩種輸出電壓規格的理想變壓器，變壓器原、副線圖匝數比為n1：n2：n3＝4：3：2，副線圈上分別接規格為“6 V，l2 W＂、“12 V，36 W＂的燈泡L1和L2，當a、b兩端接交變電源後，讓LL2以正常規格發光，則變壓器的輸入功率為 
(A) 16 W
(B) 40 W
(C) 48 W
(D) 72 W
(E)不能確定
(A) 16 W
(B) 40 W
(C) 48 W
(D) 72 W
(E)不能確定
參考答案
答案：[無官方正解]
難度：非常困難0
統計：A(0),B(0),C(1),D(0),E(0)
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