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 V.n. le 8q.xg:vr The voltage is usually stepped hkyhe5 kne0x gn,i3oj5d73k)rp nz )gz) q; *pup to 4500 V by a transformer and transmitted through a powern0rkg)gzd*o, 3yz;e)p3h qkkx enhn55jp7i ) line of total resistance 1.0 W. Find the percentage power lost in the transmission line if the voltage 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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