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phys2080_07 - Lecture 7 Magnetic Field and Magnetic Force...

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Lecture 7 Magnetic Field and Magnetic Force Chapter 19.1 - 19.6 Outline Magnets Magnetic Field Magnetic Force Motion in a Magnetic Field
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Magnets The simplest magnet is a somehow magnetized bar of iron. It attracts and holds other pieces of iron. Most of the force a magnet exerts from its ends. A magnet’s ends point north and south . The north-pointing end is called the north pole . The south-pointing end is called the south pole . Like magnet poles repel one another, unlike poles attract one another.
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Magnetic Poles Positive and negative charges in neutral matter can be separated from each other. The north and south magnetic poles cannot be separated. Every time we saw a magnet in half, it gets the 2 poles. Magnetic properties have all substances, but to a different extent. Iron is one of the best magnets.
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Magnetic Field The presence of a magnet alters properties of space near it. The altered space is called a force field .
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