匿名
匿名 發問於 科學及數學其他 - 科學 · 6 年前

Adding a Light Bulb To A serie

Will the brightness increase or decrease when another light bulb is added to a

parallel circuit ? Why ?

2 個解答

評分
  • 天同
    Lv 7
    6 年前
    最愛解答

    The brightness of the original bulb will not be changed. It is because by adding another bulb in parallel to the original bulb does not alter the voltage across the original bulb. In other words, the bulb is under the same voltage before and after another bulb is connected (in parallel). Since brightness of a bulb depends on the voltage applied to it, there will not be any change of brightness.

  • 6 年前

    正常講,光度應不變,如果你有足夠電流提供,否則會變暗,但不變光。

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