what is energy used

energy used

It is often useful to measure how much energy has been used. Your electric bill is based on how
much electricity you use over a period of time, usually a month.
To find out the total amount of energy an electric appliance uses, you have to multiply the
power it uses by the amount of time you use it. The result is measured in units of power
multiplied by time, often converted into a standard unit called the kilowatt hour.
If you use an electric toaster rated at 1000 watts (or 1 kilowatt) for a whole hour, you have
used 1 kilowatt hour of energy.
You'd use the same amount of energy burning a 2000‐watt toaster for half an hour or a 100‐
watt lamp for 10 hours.

Measured in kilowatt‐hours