Magnetic Field - Physics 202 Tuesday, March 23, 1999...

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Physics 202 Tuesday, March 23, 1999 Announcements: Mean Score on the exam: 64.7 Lecture notes: Summary for the rest of the semester: 1.) Effect of Magnetic Field (B) on moving charges. (Chapter 29) 2.) Where does a magnetic field come from? (Chapter 30) 3.) What are the effects if B changes with time? (Chapter 31) 4.) Read Chapter 32 on your own. 5.) AC current (Chapter 33) 6.) What if charges are accelerated? (Chapter 34). Magnetic Field If we bring two magnets close to each other, they will experience forces that act on each other. The forces can be either attractive or repulsive. An important difference between magnets and electric charges is that while there can be isolated charges, there cannot be isolated magnetic poles. Magnets always come in North and South poles. In our discussion of the forces between charges, it is convenient to introduce the
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concept of an electric field, E. Similarly, it is convenient to talk about a magnetic field, B, due to a magnet, or to several magnets or to moving charges. How does one "map" out the magnetic field of a magnet?
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This note was uploaded on 02/21/2008 for the course PHYS 212 taught by Professor Mahlon,gregoryda during the Spring '07 term at Pennsylvania State University, University Park.

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Magnetic Field - Physics 202 Tuesday, March 23, 1999...

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