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phy-r.s.m. current(2)
2011-11-19 2:23 am
回答 (1)
2011-11-22 4:23 am
✔ 最佳答案
(a) Area A is the energy derived from the ac supply. Area B is the energy input to the supply.(b) Energy consumed by the load = (20-5) units = 15 units.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111118000051KK00577