electromagnet-Andy_AlexJ

=Does the amount of wire wraps around a nail affect the strength of an electromagnet?=

====The purpose of our experiment was to see if the strength of an electromagnet was affected by the amount of coil wraps around the nail. In order to conduct our experiment, we built three electromagnets, all of varying strengths. The weakest electromagnet had 12 wire wraps. the electromagnet of medium strength had 25 wire wraps, and the strongest electromagnet had 50 wire wraps.==== ====We hypothesized that the number of wire wraps around a nail **would affect the power of an electromagnet**. The electromagnet with 12 wire wraps would pick up the least amount of BB's, and the electromagnet with 50 wire wraps would pick up the most BB's.==== ====Our hypothesis was right. The weakest electromagnet picked up an average of 3 BB’s. The electromagnet with 50 wire wraps (the strongest one) picked up the most BB’s, averaging 21. The electromagnet of medium strength picked up an average of 11 BB’s.====

An electromagnet is a magnet that has a magnetic force created and controlled by electricity. A magnetic field is created around the nail when an electrical current is flowing through it. The power of an electromagnet increases as the number of wire wraps increase because the magnetic field is strengthened.

Electromagnets are used in day-to-day items, such as telephones, washing machines, and light bulbs. Also, electromagnets are used to picke up scrap metal in junkyards, as you can see on our board.

Now if you watch the electromagnet we built, we will give you a demonstration of how it works.

As you can see, the electromagnet with 12 wire wraps was the weakest, the electromagnet with 25 wire wraps was of medium strength, and the electromagnet with 50 wire wraps was the strongest.