電燈泡Light Bulb

燈泡冇分正負極,

點解我將電筒內既電心正負極掉轉放,佢吾會著?

Update:

可吾可以中文?

吾太明 天同 網友的意思

3 Answers

Rating
  • aa
    Lv 7
    1 decade ago
    Favorite Answer

    鎢絲燈泡冇分正負極。

    應該係固定燈泡的 燈杯 所影響,燈杯尾部旁邊有圓型塑料的凸邊,中間係金屬物,通常係一個銅製的雞眼,提供燈泡和電池的導電功用。

    由於電池正極為一凸起的圓點頭,可以同燈杯的金屬物雞眼接觸。

    相反電池負極係平的,被燈杯的圓型塑料凸邊頂著,接觸不到雞眼便不亮燈。

  • 9W2HL
    Lv 7
    1 decade ago

    電筒內既燈泡冇分正負極, 將電筒內既電心正負極掉轉放唔會唔著, 可能接觸不良, 除非係 LED 就會唔着。

  • 天同
    Lv 7
    1 decade ago

    It is not because of the light bulb, but of the battery compartment. The positive and negative terminal of a battery compartment are of different structure. If you placed the battery wrongly, there may be not be good contact.

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