2007-01-08 00:44:03 · 5 answers · asked by tweety365 1 in Science & Mathematics ➔ Engineering
It depends on the rated watts.
2007-01-08 00:50:48 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The amount of electricity a light bulb uses depends on the light bulb. It is measured in watts. Bulbs say on them how many watts they use. A typical light bulb uses 60 watts, but you can get them as big as 200 W for normal use, and really big fittings can use up to 500 W.
A thousand watts is called a kilowatt, and a kilowatt used for an hour is called a kilowatt hour, which is the normal unit that electricity meters measure. In Ireland, a kilowatt hour of electricity costs about 10 cents.
A 60 watt bulb running for 24 hours will use 60 x 24 = 144 watt hours which is about one seventh of a kilowatt hour, so it will cost about one and a half cents for a day's worth of electricity.
2007-01-08 00:51:22 · answer #2 · answered by Gnomon 6 · 1⤊ 0⤋
Power(Watts) = Volts x Amps
Example: 100W = 120V x Amps
100W/120V = 0.83 Amps
or for a 60W bulb....0.5 Amps at 120V (standard house voltage in the U.S.)
Does this help?
2007-01-08 00:55:47 · answer #3 · answered by Anonymous · 2⤊ 0⤋
depends on the power of bulb,,... which is usually taken in Watts.
2007-01-08 01:07:17 · answer #4 · answered by Xtrobe 2 · 1⤊ 0⤋
Depends on wattage
2007-01-08 00:50:28 · answer #5 · answered by gebobs 6 · 1⤊ 0⤋