lecture17 - Magnetism (3 weeks)...

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Magnetism (3 weeks) CHAPTER 29 :  Magnetic fields exert a force on          moving  charges. CHAPTER 30 :  Moving charges (currents)  create       magnetic fields. CHAPTERS 31, 32 :   Changing magnetic fields create        electric fields. (Induction)
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Magnetic fields Magnetic poles, forces, and fields Force on a moving charged particle Force on a current-carrying wire
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Magnets and Magnetic Forces Similar model to electrostatics:  Each magnet has two poles at its ends. B  is the magnetic field vector (magnetic flux density) N S Magnetic poles come in two types, “N” and “S”.  Due to the Earth’s magnetism, a magnet will tend to rotate until the  “N” end points North. (the earth’s north magnetic pole is actually a  south pole) Forces between magnets are due to the forces between each pair of  poles, similar to the electrostatic forces between point charges.
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N N S S S N like poles repel N N unlike poles attract The force gets smaller as distance increases. 
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This note was uploaded on 10/14/2011 for the course ENGINEER CHEM ENG 3 taught by Professor Ghosh during the Spring '11 term at McMaster University.

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lecture17 - Magnetism (3 weeks)...

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