# What is electric power and what are its units?

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Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries.

## What is electrical unit?

A unit (as mentioned on the electricity bills) is represented in kWH or Kilowatt Hour. This is the actual electricity or energy used. If you use 1000 Watts or 1 Kilowatt of power for 1 hour then you consume 1 unit or 1 Kilowatt-Hour (kWh) of electricity.

## What is electric power answer?

Electric power is the rate at which work is done or energy is transformed into an electrical circuit. Simply put, it is a measure of how much energy is used in a span of time.

## What is electric power class 10th?

Electric Power is the rate at which electric energy is transferred by an electric circuit . The S.I. unit of power is WATT or 1 Joule Per Second.

## What is electric power and electric energy?

Summary. Electric power is the rate at which a device changes electric current to another form of energy. The SI unit of power is the watt. Electric power can be calculated as current times voltage. Electrical energy use equals the power of the appliance multiplied by the amount of time the appliance is used.

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## What is the cost of 1 unit?

A unit cost is a total expenditure incurred by a company to produce, store, and sell one unit of a particular product or service. Unit costs are synonymous with cost of goods sold (COGS). This accounting measure includes all of the fixed and variable costs associated with the production of a good or service.

## What is meant by 1 unit?

1 Unit Electricity is the amount of electrical energy consumed by a load of 1 kW power rating in 1 hour. It is basically measurement unit of electrical energy consumption in Joule. 1 kWh (kilo watt hour) and 1 Unit are same. 1 kWh is the amount of energy consumption by 1 kW load in one hour. Therefore, 1 Unit = 1 kWh.

## What is electric power and its formula?

Electric power is the rate at which energy is transferred to or from a part of an electric circuit. … By Ohm’s Law, V = IR, and so there are additional forms of the electric power formula for resistors. Power is measured in units of Watts (W), where a Watt is equal to a Joule per second (1 W = 1 J/s).

## What is formula of electric power?

P = R × I2 or V2/ R: These formulas are a variant of ohm’s law. Here R stands for resistance, V stands for potential difference and I stands for current. It states that power is directly proportional to the square of potential difference and inversely proportional to the resistance offered by the conductor.

## What is the formula of electrical energy?

Electric energy = electric power × time = P × t. Thus the formula for electric energy is given by: Electric energy = P × t = V × I × t = I2 × R × t = V2t / R.

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## What is electric power used for?

People use electricity for lighting, heating, cooling, and refrigeration and for operating appliances, computers, electronics, machinery, and public transportation systems.

## What are the types of electric power?

Types of Electrical Power

• Apparent power: It is the ideal power and is represented by S. …
• Active power: It is the power which is dissipated in the circuit. …
• Reactive power: The power which is developed in the circuit is known as reactive power and is denoted by Q and measured in volt-ampere reactive.

## What is an example of electrical energy?

As the charges that cause the energy are moving, electrical energy is a form of kinetic energy. Lightning, batteries and even electric eels are examples of electrical energy in action! 