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electric question

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最佳解答:

1 圖片參考:http://i599.photobucket.com/albums/tt72/goldfish_gem/hrthttrhth.jpg B1 (a) (i) IR = P / V = 300 / 220 = 1.363636A (ii) IZ = P / ( V x PF ) = 200 / ( 220 x 0.5 ) = 1.818181A (iii) IT = √IR2 + IZ2 = √1.859503140496 + 3.305782148761 = √5.172721798361 = 2.27436A (iv) W = 500W, ( 300 + 200 ) VAr = 346.4VAr ( P x tanφ ) = 200 x 1.732 VA = 700VA ( W + [W/PF] ) = 300 + [ 200 / 0.5 ] B1 (b) (i) W = 500W VAr = 96.8644VAr ( 200 x 0.484 ) VA = 522.222VA (ii) = 96.86VAr 希望幫到你,其實我已經答過架 。

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