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1. 如圖 1 所示三相平衡電路,若線電壓有效值為 400 V、三相負載的總實功率(總平均功率)為 4.8 kW、功率因數為 0.6 落後,則阻抗 為何?(備註:cos53.1°= 0.6 ) (A)
問題詳情
1. 如圖 1 所示三相平衡電路,若線電壓有效值為 400 V、三相負載的總實功率(總平均功率)為 4.8 kW、功率因數為 0.6 落後,則阻抗
為何?(備註:cos53.1°= 0.6 )
(A) (12 + j16) Ω
(B) (16 + j12) Ω
(C) (12 +
)Ω
(D) (
+j12)Ω
參考答案
答案:A
難度:
計算中
-1
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47. 在火力發電廠燃煤過程中,其能量轉換的主要順序為何?(A)化學能→熱能→力學能→電能 (B)熱能→化學能→力學能→電能(C)化學能→力學能→熱能→電能 (D)力學能→熱能→化學能→電能
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40.下列哪些為離子化合物?(A) MgCl₂ (B) H₂S(C) NaF (D) AlCl₃(E) CaO
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