Question

how to make a simple working model of 'electric bell? what are the things needed for this?

Answer 1

You will need a switch, spring, spoon or a steel stick, with a steel plate to be used as gong.Contact adjustment screw and surface(armature)
two electromagnets
One end of the taken wire is connected to the switch of circuit and the other end to one end of armature.
Armature is a soft iron rod and faces the poles of electromagnet.the contact adjustment screw consists of any metal and is attached to contact spring.A hammer(spoon) is attached to the armature.

After the model switch the switch on and as the current flows the bell will ring.