為什麼小麻雀的腳抓住電纜不會觸電?
回答 (2)
2006-12-21 5:20 am
potenial difference between the legs of the bird is Zero.
(Suppose that the wire has no resistance.)
2006-12-25 17:41:26 補充：
Also, The resistance of the bird is very high.And, the electrons always choose the path that have lower resistance.Therefore, the bird will never get shock due to no electron flow.
(Suppose that the wire has no resistance.)
2006-12-25 17:41:26 補充：
Also, The resistance of the bird is very high.And, the electrons always choose the path that have lower resistance.Therefore, the bird will never get shock due to no electron flow.
2006-12-21 4:48 am
因為電流一碰到一些東西連地面和電纜才會觸電，但小麻雀的腳沒碰地面，所以不會觸電。
2006-12-22 09:07:21 補充：
還有電流會給一些阻力大的東西觸電，但小麻雀只是腳碰電纜。阻力小，所以不會觸電。
2006-12-22 09:07:21 補充：
還有電流會給一些阻力大的東西觸電，但小麻雀只是腳碰電纜。阻力小，所以不會觸電。
參考: 某書(我記不起書名了)
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061220000051KK03208