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點解會短路?

咩係短路?點解會生短路?對電器有損害嗎?

By hill chan  (pupil) on 2010-02-03  Answers 5   Views 738

i can answer
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By Ming on 2010-02-08

短路是指在正常電路中電勢不同的兩點不正確地直接碰接或被阻抗(或電阻)非常小的導體接通時的情況。短路時電流強度很大,往往會損壞電氣設備或引起火災。

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By wushukhan (graduate) on 2010-04-29

電器既絕緣部份有問題,或者係某部份過電發生 spark

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By . (graduate) on 2010-02-17

短路...是當一個電壓源輸出電流後,並未通過任何電阻,而經由導線( 電阻趨近於0 )直接回到電流源,這就叫短路。 你們應該會上到一個公式:V = IR 當電阻趨近於0的時候 (並未到0) ,此時I就會變的無限大。 所以短路會造成電流變成無限大,而損毀電路保護套,引起火災等等... 至於...(1)插頭與電線連接處 ; (2)電線與電器相接處 。 這兩個地方,就要畫電路圖給你看了!! 大概說明一下... 當插頭與電線連接處有一個地方產生電阻趨近於0的迴路線路時,就會產生短路。

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By Linda (graduate) on 2010-02-08

電線間之接續部或電線與電器之接續部不良,因接觸電阻之故,當電流流通時產生局部過熱,導致短路。

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By ray ng (middle-school student) on 2010-02-08

電器「短路」的原因很多,例如常見的變壓器內線圈過熱,導致絕緣物料失效而引起短路,在這情況下,電器不會漏電,只會電流增加。這時,家居的「總電箱」會「跳掣」,截斷供電,防止發生進一步的意外。

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