問題詳情
44. 瓊芳把一盞燈泡及一顆電池連接如圖(一)，此時伏特計的讀數為 12V、安培計的讀數為 0.6A。如果他再將一段電阻線和線路並聯，如圖(二)，此時安培計的讀數為 0.8A。則該電阻線的電阻為多少歐姆？ 
(A) 30
(B) 40
(C) 50
(D) 60
(A) 30
(B) 40
(C) 50
(D) 60
參考答案
答案：D
難度：適中0.6
統計：A(0),B(2),C(0),D(3),E(0)
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