Short Notes:

Electric current flows from a power supply, such as a battery, to an appliance like a computer which is connected by a power cable. The circuit does not end in the appliance but loops back to the power source. This is an example of a closed ciruit. Electric current flows in a closed circuit.

The power that keeps the electric current flowing in a circuit is known as the electromotive force, or voltage.

When we turn on an electrical applicance, say electric kettle, the electric current is channelled to the appliance from the power source. Because appliances retard a circuit's current they are called resistors.

Click here for a Flash presentation on how electricity works.

Click here for a Flash presentation on a closed electrical circuit.

Click here for a Flash presentation on parallel circuit.

Click here for a Flash presentation on series circuit.