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 o01s )i/wg) foua 3t 3hvx8bl+jywc:e sf ,eeq-g g*n, wt uy3*ewcurrent at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total r*3,eyt ,- ewquenggw *esistance 1.0 W. Find the number of turns in 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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