The **power **of an appliance is the **energy** that is transferred per **second**. Electric **power** is the rate, per unit time at which electrical **energy** is transferred by an electric circuit.

## What is Electrical power?

The **power** of an appliance is the **energy **that is transferred per **second**.** Electric** **power** is the rate, per unit time, at which electrical **energy** is transferred by an electric circuit. The unit for **powe**r is the **watt**, which is the transfer of **energy** at the rate of one **joule** per **second**. **Electric** **power **can be produced by electric generators and batteries.

## Electrical power equation

To calculate** Electrical power** we use this equation.

$ {\mathit P \, \text = \mathit V \mathit I}$

## Electrical power demo

In this tutorial you will learn how to calculate the **electrical power** of an electrical appliance.

## Chilled practice question

Calculate the **power** in a circuit when a **p.d** of 18 **V** and a **curren**t of 4 **A** is measured.

## Frozen practice question

Find the **current** flowing through an appliance which has a **power** rating of 14 **KW** and a p.d of 230 **V**.

## Science in context

The** power** of an appliance is the **energy** that is transferred per **second**

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