請解答下圖的問題(d及f)：
圖片參考：http://imgcld.yimg.com/8/n/HA00744832/o/701202120048313873436501.jpg
物理(電功率問題一問)
2012-02-12 11:30 pm
回答 (1)
2012-02-13 12:12 am
✔ 最佳答案
(d) Since you have found the power consumed by the 30-ohm resistor = 30 w and Vbc = 30 vhence, I2 = 30/30 A = 1 A
I3 = (4 - I2) A = (4 - 1) A = 3 A
R = 30/3 ohms = 10 ohms
(f) Power delivered by battery = total power consumed by resistors
hence, power delivered by battery
= (320 + 30 + 90) w = 440 w
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