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 generator produces 60 A of current at 120 av)p:dy:ec8 4f bz(wra ;puf4V. The voltage is usually fyc0 ) ay7irydh78f1qn 4wf-ostepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 W. Find the number of turns h8a 1wc7nyfy)0i4rqffdy-7oin the secondary if the primary has 200 turns.
A. 5
B. 200
C. 4500
D. 7500
参考答案: D
本题详细解析:
暂无
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