...you use the lightbulb at home in the United States, will it be dimmer or brighter than 25 W 120 V bulbs?
How much power will it consume?
Help? Thanks.
2007-02-28 14:57:32 · 3 answers · asked by abc123 1 in Science & Mathematics ➔ Physics
Dimmer
P=V^2/r
P(USA)=(120)^2 /r
P(Europe)=(240)^2/r=25W
r=(240V)^2/25W=2304 ohms
P(USA)= (120V)^2/2304ohms = 6.25 Watts (this how much it will consume in USA)
Ratio = 25/6.25= 4
That is 4 times less power
2007-02-28 15:01:33 · answer #1 · answered by Edward 7 · 1⤊ 0⤋
It will be dimmer the wattage will be about half.
2007-02-28 23:11:44 · answer #2 · answered by Norrie 7 · 0⤊ 0⤋
the same, well, close. i guess different manufacturers may be slightly different due to tints in the glass, but the wattage and color is what determines the brightness.
2007-02-28 23:01:26 · answer #3 · answered by disheeki 2 · 0⤊ 1⤋