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 power 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 current 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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