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[考題] 基本電學 103初等
May 22nd 2014, 21:39, by amei2569

作者amei2569 (jovi)

站內Examination

標題[考題] 基本電學 103初等

時間Thu May 22 21:39:14 2014

請問基本電學 103初等 第40題 負載電流i(t)=10sin(wt)A, 其阻抗ZL=10+6j(歐姆） 則此負載消耗的平均功率為多少？ And:500W 想了兩天... 請問各位如何可以算出呢？ 謝謝 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 220.133.37.133 ※ 文章網址: http://www.ptt.cc/bbs/Examination/M.1400765957.A.141.html

推 zard1983:電流取成有效值100/(根號2) 然後電流平方*電阻值就ok 05/22 21:41

→ zard1983:電流是10/(根號2)打太快了~~ 05/22 21:41

→ amei2569:謝樓上！ 05/22 21:42

推 s6413621:(100/根號2)^2*R=I^2*R 05/22 21:44

→ s6413621:應該是10/根號2 05/22 21:45

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