Science Projects And Inventions

YOU NEED:

• A Bulb
• Aholder
• A wooden board
• A battery

To make an electrical switch  press two drawing i pins on a piece of wood.  Strip two wires and connect  the pins to the circuit  with a battery and a bulb.  Unfold a paper clip and hook one end  of the paper clip around one drawing pin.  Bend the other end slightly upwards and position it above the other drawing pin's head. If you press this end slightly to touch the  pin, the bulb will light up.

HOW DOES IT WORK?

The pin acts  as a switch.  As you would see, the purpose  of a switch is to give you the liberty of completing the circuit as and when required. When  you press  the  clip, the circuit is completed so the bulb lights up.