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開燈瞬間的功率確實有上千瓦,但隨著燈絲溫度的上升,很快就降到100瓦左右;正因為如此白熾燈往往是開燈的瞬間損壞.
可負載額定功率:P=UI=220*5=1100W,可負載燈數:1100/60=18盞
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