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That depends both on the light bulb's power rating, and how long you want to light it! Use the formula:
energy = power x time
If the power is in watts and the time in seconds, then the energy will be in joules (= watt-seconds).
Alternately, if the power is given in watts, you can divide by 1000 to convert to kilowatts. Then, if you multiply by hours, you get kilowatt-hours. Note that the unit used by utility companies tp charge you is kilowatt-hours.
What else can I help you with?
Are halogen bulbs more energy efficient than traditional incandescent bulbs?
Well, if they're both 40 watt bulbs they use the same amount of electricity. But incandescent bulbs produce a lot of heat as well as light. Fluorescent bulbs don't produce (much) heat, so they can use their power to produce light. So you can use fluorescent bulbs of lower wattage to produce the same amount of light.So for the same amount of light, fluorescent bulbs use less electricity than incandescent bulbs.
What is the power output of 100 kw power plant?
Your question shows the importance of using the correct symbols, because your symbols are incorrect and, therefore, your question is confusing.So, are you asking how many milliwatts (mW) there are in a kilowatt (kW), or are you asking how many megawatts (MW) there are in a kilowatt(kW)?Notice that the symbol for a watt is an upper-case W. The symbol for a milli is a lower-case m, and the symbol for a mega is an upper-case M.If the former, then there are one-thousand milliwatts in a watt, and there are one-thousand watts in a kilowatt, so there must be one-million milliwatts in a kilowatt.If the latter, then there are one-thousand kilowatts in a megawatt, so a megawatt must be one-thousandth of a megawatt in a kilowatt.
Calculate what a megawatt hour is?
Mega means million and a watt is a unit of power. A megawatt hour is the amount of power used if 1,000,000 watts are used for 1 hour, or 1 watt is used for 1,000,000 hours. If 100 light bulbs each using 1,000 watts of power are turned on for 10 hours, they will use 100 x 1,000 x 10 watt hours = 1,000,000 watt hours = 1 megawatt hour. Most electric companies charge for the number of kilowatt hours used. A megawatt hour is 1,000 kilowatt hours.
There is a 100 watt light left on for 30 days and uses 72 kilowatt-hours suppose thecost of this electricity is 5.76 how much electricity does a 100 watt light bulb use in one week what's the cost?
Check with your electric company. If you switch to 100 W fluorescent bulbs they are only about 14 watts usage. Those are the new energy efficient bulbs. You still get 100 W, but less wattage used. Therefore you bill should be reduced by some. You won't see it right away, it's over the long haul. I have switched most of my lighting (except one lamp and my kitchen) to those bulbs. They last a long long time. I will be switching my kitchen to a new fixture so I will use the 100W energy efficient bulb and get just as much light as 100 incandescent bulb. I'll put 4 in and get 400 W for 56 watts charged. < > < > 5.76/30 days = .192 cents per 24 hour period. .192 x 7 days = 1.344 dollars a week
The problems of electricity two light bulbs of 100 watt and one 60 watt both operation in a 220V circuit. Which bulb has the higher resistance and which bulb carries the greater current?
A 100 watt 220 volt light bulb (or anything consuming 100 watts on 220 volts) draws 100/220, or .45 Amps. It will also have about 220²/100, or 484 ohms resistance. A 60 watt 220 volt light bulb (or anything consuming 60 watts on 220 volts) draws 60/220, or .27 Amps. It will also have about 220²/60, or 807 ohms resistance.
How much electricity load you can drive on 1 kilowatt?
You could power ten 100 watt light bulbs.
How many 100 watt bulbs is equal to one 400 watt bulb?
ummm...4(?) is this a trick question?
How many 100 watt light bulbs can run with a 1500 watt power inverter?
we can use 12 no's
How many 100 watt bulbs can a 110 volt on 100foot line?
17
How many 100 watt light bulbs can 200 kW light?
2000
A 100 watt light bulb left on for 24hrs how many kilowatts does it draw in a thirty day period?
1 kilowatt is equal to 1,000 watts, so a 100 watt bulb uses .1 kilowatt. Technically, your home or business meter base measures kilowatt hours, meaning that it measures both the kilowatts and the amount of time. If you turn on 10 100 watt bulbs for 1 second, that would be a kilowatt, but the amount of power use would be insignificant. So... To calculate the kilowatt hours: .1 kilowatts (from above, knowing the energy use of the bulb) Multiplied by 24 hours in a day Multiplied by 30 days... .1(kilowatts) * 24(hours)* 30(hours in a day) = 72 kilowatt hours
How many watts are in 100 2.5 volt bulbs?
This question does is not answerable. A watt is a volt times an amp. With out knowing how many amps the bulbs use there is no answer.
How much a hour does 100 watt bulb use at 15p?
A 100 w light bulb uses one tenth of a kilowatt of power, therefore in 1 hour it uses one tenth of a kilowatt-hour of energy, that is 0.1 units, or 1.5 p.
Does it cost more to run four equals 25watt bulbs than one 100 watt bulb?
Yes, it would cost more to run four 25-watt bulbs than one 100-watt bulb. The total wattage for four 25-watt bulbs is 100 watts, the same as one 100-watt bulb. However, the four bulbs would consume more energy overall due to the increased electrical resistance and potential inefficiencies of multiple bulbs.
How much energy does a 100 watt light bulb use if it is left on all day?
A 100 watt light bulb uses 2.4 kilowatt-hours of energy if it is left on for 24 hours straight (100 watts x 24 hours = 2400 watt-hours = 2.4 kilowatt-hours).
How many kilowatt hours does a 100 watt light use in 20 hours?
First let us convert the power of the bulb into kilowatts.A kilowatt is 1000 watts. We have one tenth of that. So 100W = 0.1kWTo work out the kilowatt hours we simply multiply the power in kilowatts by the time the bulb is on for (in hours):0.1kW x 10h = 1 kWha 100 watt bulb uses 100 watts of power. In ten hours it uses 100x10 watt-hours, or 1 kilowatt-hour. A kilowatt-hour is also called a unit, and units are what you pay for.
What does kilowatt hours mean?
kWh = Power(kW) x Time (hours)AnswerA kilowatt hour (symbol kW.h) is a unit of measurement of electrical energy.
