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 通用国际物理

[单选题]
A transformer is a dc ,3;o ;xwey9b d ; tk9v3afkv8h6yxvrevic2cafnsu3 lc/.1 c :hi)bgkn/ze used 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

微信扫一扫，分享更方便