1. 有A, B 兩個metal ball (A左B右), 佢地係掂住既, 之後有條 +ve charged 既野拎埋去A ball 左邊 ( 冇掂到個ball) , 之後粒 B 比隻手拍earth 左, 之後拎走哂其他野,得返A同B ball, 咁最終 A 同B 個charge 係咩呢 ???
2. 電唔電得死人係 睇 current 一係睇 voltage ??
急!!F5 phy, 靜電, 電
2007-04-23 7:47 am
回答 (2)
2007-04-23 11:26 pm
1. -ve charged
2. 應該係睇power
2007-04-25 16:29:18 補充：
>>power大又點>>通唔過你個身又點會電得死你呀Power=Voltage*current=resistance*(current^2)=(voltage^2)/resistancepower係指通過身體嘅power>>雀仔企上去架空高壓電纜都唔會電死ga雀仔企上去架空高壓電纜係兩隻腳企喺同一條電纜,potential difference~0power=0*current=0
2007-04-25 16:29:30 補充：
>>架空高壓電纜幾百到幾千 MW (10^6 W)唔好搞錯voltage同power唔會話架空高壓電纜嘅power,因為呢個係power lossPower loss=Voltage*current=resistance*(current^2)=(voltage^2)/resistancevoltage係用咗嘅voltage,唔係transmission voltage>>不要唔識扮識了 , 害人不淺呀 呢句說話留番畀你用
2. 應該係睇power
2007-04-25 16:29:18 補充：
>>power大又點>>通唔過你個身又點會電得死你呀Power=Voltage*current=resistance*(current^2)=(voltage^2)/resistancepower係指通過身體嘅power>>雀仔企上去架空高壓電纜都唔會電死ga雀仔企上去架空高壓電纜係兩隻腳企喺同一條電纜,potential difference~0power=0*current=0
2007-04-25 16:29:30 補充：
>>架空高壓電纜幾百到幾千 MW (10^6 W)唔好搞錯voltage同power唔會話架空高壓電纜嘅power,因為呢個係power lossPower loss=Voltage*current=resistance*(current^2)=(voltage^2)/resistancevoltage係用咗嘅voltage,唔係transmission voltage>>不要唔識扮識了 , 害人不淺呀 呢句說話留番畀你用
2007-04-23 8:20 am
開始因兩球接觸,可看為一個導體.帶正電體感應A球左端有負束縛電荷,B球右端產生正自由電荷,,瞬間椄地時正自由電荷消失,負束縛電荷保存,正電棒栘開,負電兩球均分,分開後A,B都帶負電.
能否電死人看通過心臟的電流大小.
能否電死人看通過心臟的電流大小.
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https://hk.answers.yahoo.com/question/index?qid=20070422000051KK06672