Electromagnet
Factors Affecting the Strength
(Sponsored Project Guide)
Introduction:

An electromagnet is a device that becomes magnet when connected to electricity. Unlike permanent magnets, you can easily turn on or off the magnetic force in an electromagnet. The simplest form of an electromagnet is a metal rod (such as an iron nail) that you wrap some insulated wire on that.

Electromagnets are used to make electric bells, speakers, microphones, electrical valves, electrical door openers, electric motors, buzzers, vibrators, magnetic cranes, televisions, magnetic storage device, tape recorders and many more.
 
Material and instructions:
 To construct a basic electromagnet you need a battery, a nail (iron rod) and some insulated wire. In this project you will make at least 3 electromagnets and compare their strength. Electromagnets you make are different only in the factor you are testing.
Details of this project:
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