ch15_review - A. Manalaysay – PHY2054, Fall 2004 CHAPTER...

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Unformatted text preview: A. Manalaysay – PHY2054, Fall 2004 CHAPTER 15 First, Coulomb’s Law applies to the force between two point charges : tells magnitude only! The direction is determined by the system. Force lies along the line connecting two charges. Opposite charges attract; like charges repel. Electric Field:--A charge that feels an electric force due to other charges is said to be in the presence of an electric field, E , defined as the ratio of the force to the value of the charge: F = q E--> The force a charged particle feels when placed in an external electric field . Notice that charge, q, is a scalar, so F and E (which are vectors) must be either point in the same direction or point in opposite directions. When would they point in opposite directions? Clearly, since charges produce forces on one another, and charges feel a force when they are in an electric field, then charges themselves produce electric fields. If you look at Coulomb’s Law long enough, you’ll see that: Again, this tells the magnitude only...
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This note was uploaded on 01/15/2012 for the course PHY 2054 taught by Professor Avery during the Spring '08 term at University of Florida.

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