科學問题????????????????????????????

2007-07-25 3:45 am
如果張一個可以把動力轉變成電的東西(唔記得叫wt)接駁一個「摸打」,形成一個循環,重複多次,把「摸打」連接果樣野,再把電分支,after that連接一起,可否自動生電嗎?

回答 (3)

2007-07-30 7:49 am
✔ 最佳答案
你係咪話 :
用一架發電機發電,然後將電接去電動機,然後又用電動機既轉動力來轉動架發電機,形成一個循環,重複多次,再把電分支,然後又連接一起,可否自動生電嗎?
即係
發電機發電1000w,電動機用電900w係可以既,然後用900w既電動機佢轉動架1000w既發電機就唔得,除非你轉動架發電機係800w就得,因爲發電機有銅綫損失,鉄渦流損失,漏磁損失等,導綫長度又有電壓降損失,到佐電動機有銅綫損失,鉄渦流損失,轉數損失等,即係過河就要濕腳,自轉都成問題,邊仲有電出呢。
2007-07-25 6:41 pm
You mean the generator (發電機).

As you connect the motor to a generator, there is a energy transfer form the generator to the motor. As you connect more motors to the genertor, more energy is needed to transfer form the generator to the motors.

In your idea, energy cannot be created. You just transform the energy from kinetic energy (KE) to electric (E), and then from E to KE and then .... From the point of energy conservation, you will never creat energy.

If you are interested in this, you can search on web by the keyword (永動機)
2007-07-25 9:18 am
其實係咪話用一個motor ge動力變做電力,再用電力推動個motor,形成cycle??

我諗理論上一開始只要夠電力推著個motor,或有人轉下佢,應該係得ge,但實際上,因為energy lost其實好勁,所以係唔得ge

2007-07-25 14:02:02 補充:
"可否自動生電嗎"理論上可生電,但所生之電比motor用左,所以唔可以再攞出黎用的,但實際上連生電再令motor不停轉動都做唔到!
參考: 個人意見


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