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Watts is a RATING of power not energy therefore 100 watts is a constant no matter how long its running for.. watt-hours is a rating of energy and after 24hrs 2.4kilo-watt hours have been used this is around 30-40p worth!!
Electricity in metric countries (USA and UK aren't metric) is charged in kilowatt hours.
To work out how much for the problem stated, mutiply the watts by the hours.
100 * 24 = 2400
watts * hours = watt hours
There are 1000 watts in a kilowatt, so to get kilowatt hours, divide by 1000
2400 / 1000 = 2.4
watt hours / 1000 = kilowatt hours
Answer is 2.4 kilowatt hours.
In non metric countries (USA and UK) , the energy unit is the calorie.
There are 859.845227859 calories in 1 watt.
So multiply 24 by 859.845227859 to get 20636.285468616 calorie/hours
Your energy utility may bill you in kilocalories, so divide by 1000
20636.285468616 calorie/hours / 1000 = 20.636285468616 kilo calorie/hours
Round it off to 20.64 kilocalorie hours.
Comment
The 'calorie' hasn't been used in the UK (well, other than in the food industry!) since I was in school, sixty years' ago!! The calorie was used in the centimetre-gram-second-ampere (cgsA) system, which has been obsolete for a great many years! It was superseded by the metre-kilogram-second-ampere (mksA) system and, since then, by the SI system (which is based on the mksA system). Energy, in the SI system is measured in joules.
Furthermore, the watt hour IS a metric unit. It's not an SI unit (that's the joule), but nevertheless, it is a metric unit.
http://answers.Yahoo.com/question/index?qid=20090202143329AAqQC8a
same question here ^_^
Have a nice day ^_*
An incandescent 100 Watt bulb at 120 Volts draws about .83 amps.
watts / 1000 x hours used =kwh in this case its a full circle. 60kwh or 216000000joules
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How much energy does 100 w electric bulb consume in two hours?
A 100-watt electric bulb consumes 200 watt-hours of energy in two hours (100 watts x 2 hours = 200 watt-hours).
How long wil 40w bulb glow in order to consume one unit of electricity?
A 40 watt bulb uses 40 watt-hours in an hour, which is 0.04 kilowatt-hours, so it would take 25 hours to use 1 kilowatt-hour or 1 unit.
How many kWh will a 32 watt fluorescent bulb use?
A 32-watt fluorescent bulb, when used for 1 hour, will consume 0.032 kWh (32 watts ÷ 1000). The energy consumption can be calculated by multiplying the wattage by the number of hours used.
What is the different between a 100 watt bulb and a 60 watt bulb?
40 watts of consumed power. The light output may be greater with one compared to the other, but wattage alone does not give us that information. Electric heaters, for example, consume 1500 watts of power and produce almost no visible light.Check the Lumen's. That is where the difference is.Current draw and light output.A 60 watt bulb uses 60 watts of electricity (i.e. it converts 60 joules of energy per second), a 100 watt bulb converts 100 joules per second. Electrical power is measured in watts. Since a 60 watt bulb pulls less energy to it than a 100 watt bulb the 60 watt bulb will not be as bright.Resistance.Just in the amount of power used and the brightness of the bulb. The 60 watt bulb might be a bit smaller.
How long does it take for a 100-watt light bulb to consume 100 watts of energy?
A 100-watt light bulb consumes 100 watts of energy in one hour, as power is the rate at which energy is consumed. Therefore, it will take one hour for a 100-watt light bulb to consume 100 watt-hours of energy.
How much energy does 100 w electric bulb consume in two hours?
A 100-watt electric bulb consumes 200 watt-hours of energy in two hours (100 watts x 2 hours = 200 watt-hours).
How long wil 40w bulb glow in order to consume one unit of electricity?
A 40 watt bulb uses 40 watt-hours in an hour, which is 0.04 kilowatt-hours, so it would take 25 hours to use 1 kilowatt-hour or 1 unit.
Is a watt a light bulb?
A 60 watt light bulb is a light bulb with 60 watts capacity. When talking about watts, you're talking about the power that is transferred from the appliance to the accessories. Therefore, the light bulb labeled "60 watts" takes 60 watts to light up. A 60 watt light bulb will not be as bright as a 120 watt light bulb.
What it is the difference between 100 watts and 75 watt light bulb?
The main difference between a 100-watt and a 75-watt light bulb is the amount of light output they produce. A 100-watt bulb will be brighter and consume more energy compared to a 75-watt bulb. The 100-watt bulb may also generate more heat than the 75-watt bulb.
How long does it take for a 100 watt light bulb to cobsume 100 units of energy?
Assuming the 100 watt light bulb is always on, it would consume 100 units of energy in 1 hour (100 watt-hours = 0.1 kilowatt-hour = 1 unit of energy per hour).
How much current does a 23 watt bulb consume?
To answer this question a voltage must be given.
How many watts does a 18 watt floresent light bulb consume?
Divide the wattage by the voltage. If it is 120Volt then the answer is .15Amp
How many kWh will a 32 watt fluorescent bulb use?
A 32-watt fluorescent bulb, when used for 1 hour, will consume 0.032 kWh (32 watts ÷ 1000). The energy consumption can be calculated by multiplying the wattage by the number of hours used.
What is the different between a 100 watt bulb and a 60 watt bulb?
40 watts of consumed power. The light output may be greater with one compared to the other, but wattage alone does not give us that information. Electric heaters, for example, consume 1500 watts of power and produce almost no visible light.Check the Lumen's. That is where the difference is.Current draw and light output.A 60 watt bulb uses 60 watts of electricity (i.e. it converts 60 joules of energy per second), a 100 watt bulb converts 100 joules per second. Electrical power is measured in watts. Since a 60 watt bulb pulls less energy to it than a 100 watt bulb the 60 watt bulb will not be as bright.Resistance.Just in the amount of power used and the brightness of the bulb. The 60 watt bulb might be a bit smaller.
How long does it take a 60 -watt light bulb to consume 60 -watt hours of energy?
60 watt-hrs= 60 watt*1 hr so it will take 1 hour.
How long does it take for a 100-watt light bulb to consume 100 watts of energy?
A 100-watt light bulb consumes 100 watts of energy in one hour, as power is the rate at which energy is consumed. Therefore, it will take one hour for a 100-watt light bulb to consume 100 watt-hours of energy.
How much does it cost you to burn a 0 watt light bulb for 24 hours a cost of 0.085156 per kwh?
A 0 Watt bulb does not consume electric power so the cost is zero.
