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# Where do you use Kilowatt Hour?

###### Wiki User

###### December 14, 2008 7:31AM

Measuring electricity usage.

## Related Questions

###### Asked in Home Electricity

### The unit of electric energy is the kilowatt?

Nope. "Kilowatt" is a rate of using electric
energy. The longer you keep using
a kilowatt, the more energy you'll use, and the higher your
electric bill will be.
The unit of energy that appears on your bill is the
"kilowatt-hour". It might
surprise you to learn that the kilowatt-hour is the amount of
energy you use
if you use energy at the rate of one kilowatt and you keep it up
for one hour.

###### Asked in Home Electricity

### How many kwh does a 400w bulb use in an hour?

Well 1 KWh is "1000 watts per hour". So if you have 400w per
hour take
400watts per hour divided by 1000 and it shows that you get
"0.4KWh".
Answer
There is no such thing as a 'kilowatt per hour', which is why
the unit of measurement is a 'kilowatt hour', and NOT a 'kilowatt
per hour'!.
To determine the number of kilowatt hours of energy consumed by
the lamp, multiply its power, expressed in kilowatts, by the length
of time it is in use. For your example, the answer is 0.4 kWh.

###### Asked in Math and Arithmetic

### How many kilowatt per hour does a 10kilowatts generate?

There is no such thing as a "kilowatt per hour". Kilowatt is a
unit of power, not of energy. A unit of energy is kilowatt-hour.
That's kilowatt times hours, not "per" hour ("per" implies
division, not multiplication). If a generator produces 10
kilowatts, that means it produces 10 kilowatt-hours every hour.

###### Asked in Home Electricity

### How much does one kilowatt cost?

all inclusive, use 10 cents for any estimates and you are good
to go. one kilowatt hour will run a 1hp electric motor or 17 60
watts light bulbs for one hour. OR 1 kwh is enough to leave one
light bulb on for 17 hours.
Answer
You are not charged by the kilowatt (power) but by the
kilowatt hour (energy). Check with your electricity supply company
to find out how much they charge per kilowatt hour.

###### Asked in Home Electricity

### How is electricity usage measured?

Electricity usage is measured in kilowatt/hours. To put this in
perspective, a 1500 watt kettle that is on constantly for one hour
would use 1.5 kilowatts. Multiply that by the cost per kilowatt
hour will give you the operating cost of your appliance. On your
electrical bill the rate per kilowatt hour should be stated. It
could be in the range of .07 to .10 cents per kilowatt hour.

###### Asked in Home Electricity

### How many houses does one kilowatt serve?

Pretty much, just one. Your 100 watt lightbulb uses one tenth of
a kilowatt every hour. Ten light bulbs on use 1 kilowatt of power
in one hour. When your water heater runs, it takes about 20 minutes
to use 1 kilowatt. One kilowatt goes quick and is nothing. At
around 10 cents per kilowatt, it takes a while for your power bill
to add up.

###### Asked in Physics

### The kilowatt hour is unit of what quantity or quantities?

The kilowatt-hour is a unit of energy. The basic metric unit of
energy is the Joule. If you use energy at the rate of 1 Joule per
second, you are using '1 watt' of power. If you use 1,000 Joules
per second, you're using '1 kilowatt' of power. If you keep it up
for an hour (3,600 seconds), you've used a total of 3,600,000
Joules of energy. The other ways to express that amount of energy
are: 3,600,000 watt-seconds 3,600 kilowatt-seconds 1
kilowatt-hour.

###### Asked in Math and Arithmetic

### How many kilowatt hour make 1 watt?

1kilowatt = 1000 watts
but you cannot compare a kilowatt hour to a watt, the extra
dimension of time changes what is being measured. The watt is a
measure of power. The watt second and the kilowatt hour is energy.
The misunderstanding comes from our use of the term POWER COMPANY
for our electricity suppliers. They bill us in kilowatt hours which
is energy, not power.