|An electric bell is among the
most common electrical equipments found in every house or office. It is
used as a door bell, phone ring, fire alarm and can be found in many
different shapes and sizes. An electric bell is a simple example of how
we can use electromagnets to convert electrical energy to mechanical energy and sound waves.
The same mechanism used to vibrate a hammer in an electric bell, is used
in many other industrial and household equipments. Two well known
examples are Electric Shavers and Shearing machines.
These two both
work like a buzzer, but instead of an iron arm, a blade will be vibrated.
In this project you will make a bell or a buzzer to demonstrate the
vibrating motion produced using an electromagnet. You will also study
factors affecting the strength of your electromagnet.