Why is electrical energy measured in kilowatt-hour?

Kilowatt hours (kWh) are the units in which electrical power usage is primarily measured — they are what you see on your electricity bill. The reason that this unit is used to measure your usage rather than kilowatts on their own is because kWh is a measurement of absolute power consumed over time.

What is the difference between kWh and joules?

One kilowatt-hour is equivalent to the energy of 1,000 joules used for 3,600 seconds or 3.6 million Joules. In equation form: 1 kWh = 3.6 million J. So if your building uses 5000 kWh each day, your building is consuming the same amount of energy that would be required to lift 18 billion cans of soda per day.

What is the relation between watt and joule?

Watts are defined as 1 Watt = 1 Joule per second (1W = 1 J/s) which means that 1 kW = 1000 J/s. A Watt is the amount of energy (in Joules) that an electrical device (such as a light) is burning per second that it’s running.

What is the relation between Joule and kW hour?

Answer: kWh is a commercial unit.

Is kilowatt hour a unit of work or power?

The kWh is a unit of power. It is derived from the joule, which is the joule per second, which is the unit of power in the International System of…

What kilowatt hour is equal to?

One kilowatt-hour (1 kWh) is equivalent to a power of 1 kW being used for 1 hour, or 0·5 kW for 2 hours, 2 kW for 0·5 hour, etc. 1 k W h = l kilowatt × 1 hour = 1000 watts × 3600 seconds = 3,600,000 watt-seconds or joules .

What is the relation between kilowatt and kilowatt hour?

A kilowatt-hour (kWh) and a kilowatt (kW) may sound like the same thing, but they’re not quite tomato-tomahto. While both are interrelated units of measurement, the important difference between kWh and kW is that a kWh reflects the total amount of electricity used, whereas a kW reflects the rate of electricity usage.