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]
The output of a genera0 x;8ofiolt:z8y8p xator )/srmsk f9ot lfe+18p is 440 V at 20 A. It is to be transmitted on a line with resistance of 0.60 W. To what voltage must the generator output be stepped up with a transformer if the power loss in transmission is not to exceed 0.010% of the original pres9/mpos +tf8kf l1 )ower?
A. $4.4 \; kV$
B. $7.3 \; kV$
C. $22 \; kV$
D. $45 \; kV$
参考答案: B
本题详细解析:
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