Phys 0175 - Lecture 20

Phys 0175 - Lecture 20 - Lecture 20 (Feb. 27, 2009):...

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Lecture 20 (Feb. 27, 2009): Chapter 28: Magnetic Field, Magnetic Forces Magnetism Magnetic field Magnetic field lines and magnetic flux Magnetic force on a moving charge Illustrative example
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Permanent magnets have two poles: North and South Unlike poles attract Like poles repel Magnetism
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Either pole attracts certain conductors that are not permanent magnets, like iron; but not , for example, other conductors like Al, Cu, brass, or stainless steel.
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Examples of magnetic field lines (they point from N pole to S pole): Bar magnet Bar magnet Cee magnet Horseshoe magnet
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The earth has a permanent magnetic field, with a magnetic South pole near (but not coincident with) the geographic North pole. The direction of the earth’s magnetic field changes slowly over time; it has even reversed direction during the 4.5 billion years of the earth’s existence
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readily separated (e.g. protons and electrons), one cannot separate the North pole of a magnet from its South pole. There are no
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This note was uploaded on 04/06/2009 for the course PHYS 0175 taught by Professor Koehler during the Spring '08 term at Pittsburgh.

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Phys 0175 - Lecture 20 - Lecture 20 (Feb. 27, 2009):...

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