2. How it works:
When the copper wire is connected to the
battery, the circuit starts working. The electric
current go to the negatively charge material to
positively charge material. To do this, it must
pass all the circuit. The electrons pass along the
copper wire and the clip, it’s a switch. They enter
through a terminal and they go to the
electromagnet. When this happens, the
electromagnet attracts the saw and for this
reason it isn’t a close circuit and it stops working.
The saw goes back to its original position and
then the circuit is closed and the process is
repeated. This is what malces the ringing
sound. The electrons go through the screw and
back to the battery. The more power, the faster
and louder is the sound of the bell.
