問題詳情
6. 使用太長之延長線接電源時會使
(A)電壓下降
(B)電壓增高
(C)電阻變小
(D)電壓不變。
(A)電壓下降
(B)電壓增高
(C)電阻變小
(D)電壓不變。
參考答案
無參考答案
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