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標題:

F5 phy Electromagnetic Induction

發問:

10kW of electrical power is transmitted through a cable of resistance 1 ohm. Calculate the power loss when it is passed through the cable at (a)220V (b)400kV

最佳解答:

此文章來自奇摩知識+如有不便請留言告知

a. By P = IV 10 000 = I(220) Current, I = 45.45A By Plost = I2R = (45.45)2(1) = 2.07 X 103 W b. By P = IV 10 000 = I(400 000) Current, I = 0.025A By Plost = I2R = (0.025)2(1) = 6.25 X 10-4 W That explains why electricity is transferred by high voltage in cable. It is to reduce the power lost.

其他解答:

嗯..想補充一下,我們常見的應該P=VI吧?(雖然P=IV都對,可是只是有點不慣) **只是個人意見**1C924F1C0172E337

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