1. 某100W，220V的燈泡，其額定電流為?(A) 0.2 A(B) 0.45 A(C) 0.9 A(D) 1.45 A

問題詳情

1. 某100W，220V的燈泡，其額定電流為?
(A) 0.2 A
(B) 0.45 A
(C) 0.9 A
(D) 1.45 A

參考答案

答案：B
難度：簡單0.775
統計：A(7),B(31),C(2),D(0),E(0)

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【蔡捷仁】評論

求電流公式：瓦特/電壓（Ｗ/V)=100/220 = 0.4545 A

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