IT IS VERY EASY TO MAKE

A Home – made switch

Material needed:

• 2 tacks
• 1 paper clip
• 1 rubber
• 1 small lamp
• 1  4,5volt battery
• Cable

You can easy make a switch using a paper clip and tacks.The circuit closes when the clip comes into contact with the tacks. When the lamp is on, the clip closes the empty place of the circuit and allows the passage of the electric current whereas  when the clip opens, the empty place that is created doesn’t allow the passage of the electric current.

NOW, IT IS TIME TO PLAY USING A BATTERY AND A LAMP:

In which of the folloing situations is the lamp  on?