Physics Unit21: Electromagnetic Induction & Faraday's Law (id: 4f6ceab79)

本题目来源于试卷: Physics Unit21: Electromagnetic Induction & Faraday's Law，类别为 国际高中通用物理

[单选题]
A transformer is a devicorddq *pl/k;/d (a nw3aa: .oue uvk, x( e7.:vwx9kruy fsed to

A. transform an alternating current into a direct current.
B. transform a direct current into an alternating current.
C. increase or decrease an ac voltage.
D. increase or decrease a dc voltage.


参考答案:  C


本题详细解析: 暂无

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