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 produceszf pn 64hw+yg m*d)j-z 60 k l2gq2kr -r3uf *q,sc2geiw.v k7od*A of current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 W. Find the number of turns in the secondary if t erg2qkgk v*rksfi 32o.,7wcd2q-ul*he 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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