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Transcript
Magnetism and Electromagnetism Magnet ● ● Magnets can attract and repel other magnets. ○ They have north and south poles. ○ Opposite attracts! How are magnets similar to electrons and protons? http://abyss.uoregon.edu/~js/21st_century_science/lec tures/lec04.html Electromagnetism ● ● ● Magnets have a magnetic field, which is the area around the magnet where the magnet can make things move. Charged particles have an electric field. In the picture to the right, the magnet made the iron shavings move http://www.explainthatstuff.com/magnetism.htm l Electricity and Magnets are connected Electricity and Magnets are connected ● ● Electricity can make a magnetic field Magnets can make electricity A current can generate a magnetic field, which makes the iron shavings move A moving magnet will cause electrons to move Magnets What makes a material a magnet? ● ● The atomic structure of a material determines if it is magnetic. If the atoms magnetic field point in the same direction, then it is a magnet Design Challenge Permanent magnets have domains that are always aligned. Temporary magnets have domains that will align when close to a magnetic field. The paper clip and nail is a temporary magnet. They will become magnetized when there is a magnetic field. Without using a magnet, can you magnetize the nail and paper clip?
