What is the Electric cost per kilo watt hour?

Answer 1

A kilowatt is a unit of power, while a kilowatt hour is a unit of energy. Power is the rate that energy is used. This means that something that operates at 1 kilowatt for 1 hour uses 1 kilowatt hour of energy.

Answer 2

The kilowatt is a unit of power (energy / time); the kilowatt-hour is a unit of energy - the energy equivalent to the power of 1 kW, during one hour. The kilowatt-hour is equivalent to 3.6 x 106 Joule (a Joule is the same as a Watt-second).

The kilowatt-hour is commonly used as a unit to charge for electrical energy. Note that you pay for electrical energy, not for electrical power.

Answer 3

The official SI unit for energy, of course, is the joule; but the kilowatt-hour (equal to 3.6 million watt-seconds, i.e., 3.6 million joules) is used traditionally, probably for historical reasons. It is fairly easy to use in calculations (e.g., if you use a 0.5 kW device for 4 hours, you use 0.5 x 4 = 2 kWh of energy). Scientists may prefer to switch to joules (or megajoules; 1 kWh = 3.6 MJ), but this is unlikely to change. Common people are more comfortable doing this type of calculations by the hour than by the second.

Answer 4

The cost of electricity per kilowatt-hour varies depending on location, time of day, and energy provider. In the United States, the average cost is around 13 cents per kilowatt-hour. However, this can range from around 9 cents to 20 cents or more, depending on factors such as renewable energy programs, demand charges, and taxes.

Answer 5

A Joule is too small a unit. You would not use a nanometre to measure everyday things!

Answer 6

The cost varies from one country to another.