Physics Unit21: Electromagnetic Induction & Faraday's Law (id: 5f93230da)

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 step-down transformer is needed to reduce a priw xfx7li1( j1oapglyueno2b;kf4 ,;7mar8 z7 8arn)vdfda1;igzp7f p q/y voltage of $120 \; V$ AC to $6.0 \; V$ AC. What turns ratio is required?

A. 10:1
B. 1:10
C. 20:1
D. 1:20


参考答案:  C


本题详细解析: 暂无

微信扫一扫，分享更方便