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當前位置:深圳市歐姆雷盾科技有限公司 » 新聞中心 » 行業資訊 » 各國晴天大氣電場強度--防雷器廠家

各國晴天大氣電場強度--防雷器廠家

人氣:1577發表時間:2018-06-13

   雷電的產生與大氣電場有關。人類賴以生存的地球不單是一個磁體.有南北兩個磁極,而且還是一個攜帶著大約5.4*10的五次方庫倫 負電荷的球體。這些電荷產生一個自空中指向地面的電場, 該電場稱之為大氣電場。人們就生活在這樣一個電場中,但卻感覺不到它的存在,因為在晴天,大氣電場遠不如橡地球磁場那樣容易用簡單的辦法覺察和顯示出來。當人們在居室內時.房屋與大地等電位.房間內兒乎不存在大氣電場,當人們在室外時,人從頭到腳這樣高度內承受的大氣電場的電位差大約達到200V , 那么人為什么沒有感覺到觸電呢?因為晴天干燥空氣的電阻率很高,約為 10^5* 歐 , 相對說來人是良導體. 從頭到腳之間的電位差為零,所以人不會感到電擊。同樣,山脈、樹木、房屋等物體的電阻率相對也很小.可視為導體.于是這些地方的大氣電場的等位曲也隨著地形和地物的高度而起伏,如圖1.7 所示。到了遠離地面的高空.大氣電場的等位而將趨向于以地球為核心的同心球面。

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防雷器

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防雷器

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