2006-12-20 05:00:04 · 8 answers · asked by peter w 2 in Science & Mathematics ➔ Engineering
250w is one quarter of a unit of electricity. Therefore it would use one unit every four hours, 6 units per day. Multiply that by your unit price for electricity (varies by supplier) and you have your answer.
Starfox
2006-12-20 05:06:22 · answer #1 · answered by Starfox 2 · 1⤊ 2⤋
Electricity board charges on the unit basis.
1 unit=1 KWHour.
1 Day = 24 hrs
1 000 W=1 KW
250 W=0.25KW
KWHour=0.25*24
KWHour=6
So, you are consuming 6 units of electrical power by running a 250 watt light per day.
IF the power charges are x $ per unit , then you have to pay (6*x ) $.
(If x=1/6, then you have to pay,
6*1/6=1$)
2006-12-20 13:52:24 · answer #2 · answered by Anonymous · 1⤊ 0⤋
250 watts x 24 hours per day = 6000 watt hours / day
divide by 1000 and the usage is 6 kwh / day.
At the present rate (approx. 7.9 cents / kwh), that would amount to 7.9 x 6 = 47.4 cents / day that it would take to operate the light bulb. This assumes the basic kwh rate which will vary from one month to the next or from one area to another. Another assumption that is made is that you have sufficient wiring to prevent heating of the wiring which will increase the usage.
2006-12-20 15:29:25 · answer #3 · answered by Doug R 5 · 0⤊ 1⤋
250 watts x 24 hours / 1000 wattHrs/Kwh x Electricity cost per Kwh where you are.
2006-12-20 15:39:25 · answer #4 · answered by acablue 4 · 0⤊ 1⤋
Every four hours - you will use 1000 Watts. A kilowatt. ANd you pay for these when your bill comes. One Kwh every four hours means 6 a day.
Then it all depends on how much your electricity company charges for peak and off-peak units.
2006-12-20 13:44:57 · answer #5 · answered by Stanleymonkey 2 · 0⤊ 2⤋
6 kWh, 6 units. Depends what you pay per kWh. Currently around 8c/kWh in the US so 48c. My electricity company charges a bit less.
2006-12-20 13:06:20 · answer #6 · answered by Chris H 6 · 0⤊ 2⤋
Multiply the rate (cents/kWHr) by .250kW and you will have the cost per hour in cents. Multiply that by 24 to get cost per day in cents. (A typical rate is 8 or 9 cents per kWHr.)
2006-12-20 13:07:18 · answer #7 · answered by minermt 1 · 0⤊ 2⤋
24 x 0.25 would give 6 kilowatt hours so it would depend on your tarriff from your energy provider per kilowatt hour
2006-12-20 14:55:58 · answer #8 · answered by CHARLIEDONTSURF 2 · 0⤊ 1⤋