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 currebo-4,jo mhky+nt at 120 Vqpy 4d2q i 8 voho/zwkc-n09a+. 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 percentage power lost in the transmission line if the voltag92a ic0y/+oqwzkqopnd 8 vh-4 e is not stepped up.
A. 0.018%
B. 0.036%
C. 25%
D. 50%
参考答案: D
本题详细解析:
暂无
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