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Electromagnets. BACKGROUND An electromagnet is a device in which magnetism
is produced by an electric current. British electrician ...
... the 20th century. A few countries are using powerful electromagnets to
develop high-speed trains, called maglev trains. Maglev is ...
... flows through a wire or a conductor. Most electromagnets consist of wire
wound around an iron core. This core is made from soft ...
... The guideway has thousands of electromagnets for levitation set in the floor
along the way. More electromagnets for propulsion are ...
... One dozen on the coaster and one dozen on the track. Then a motor pulls the dozen
electromagnets on the track that pull the coaster behind it. ...
Submitted by diffuzn on November 8, 2005
Category: Science
Words: 1227 | Pages: 5
Views: 148
Popularity Rank: 70,802
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BACKGROUND
An electromagnet is a device in which magnetism is produced by an electric current. British electrician, William Sturgeon invented the electromagnet in 1825. The first electromagnet was a horseshoe-shaped piece of iron that was wrapped with a loosely wound coil of several turns. When a current was passed through the coil; the electromagnet became magnetized and when the current was stopped the coil was de-magnetized.
Sturgeon displayed its power by lifting nine pounds with a seven-ounce piece of iron wrapped with wires through which the current of a single cell battery was sent. Sturgeon could control his electromagnet; this was the beginning of using electrical energy for making useful and controllable machines and laid the foundations for large-scale electronic communications.
ASSIGNMENT OBJECTIVE
Using this theory, we were able to produce an electromagnet, which was the purpose of this assignment. However, the second component was not only to have a working magnet, but to make the magnet as most powerful as possible. We were required to investigate one variable and experiment with this variable to produce the most powerful magnet possible.
The variable that I investigated was; how does the number of coils affect the strength of the magnet? To be able to experiment with this variable, I was required to use the same materials for each magnet which composed of:
• Ferrite Soft Iron Core (50 grams, 100mm in Length)
• Coated Copper Wire (0.630mm Width)
My hypothesis was that, the more number of coils wound around the soft iron core, the stronger the magnet would be and a proportional linear relationship would be present. That is, it would be able to pick up more staples that one with fewer coils.
EXPERIMENTING WITH THE VARIABLE
I made 3 magnets, each with a different number of coils to experiment my variable. To trail the...
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