The Magic of a Battery

What is a battery?

A battery is a device that provides electricity to make our clock ticking, our electronic toy moving, our torch lighting up, our hand phone ringing and so forth.

A battery has two terminals. A positive terminal is marked with a + symbol and a negative terminal is marked with a – symbol.

Electrons come out of the negative terminal (-) and flow around the circuit and
re-enter the positive terminal (+).

The flow of electrons in a complete circuit provides us electricity and make us able to talk to our friends through a hand phone, see things at night by using a torch light and so forth.

You need two wires, a battery and a bulb to see a battery works as magic.
When the wires are connected in a complete circuit as shown, the bulb will light up.