Unformatted text preview: Chapt. 23 The Electric Field 185 023 qfull 00700 3 3 0 tough math: farfield limit of a charge system 7. Let us consider the electric field in the farfield limit for a localizable system of point charges. In this context localizable means that all the charges can be enclosed in finite closed surface: e.g., a sphere or a box. a) Draw a diagram indicating the charges and in particular a general charge q i . Put an origin someplace within the system of charges. Draw vector vector r i from the origin to q i and also draw a general vector vector r to a point well outside of the system in the far field. The angle between vector r i and vector r is θ i . b) Give the formula for the electric field at vector r due to the whole system. Give it in a form that makes explicit use of the law of cosines. c) Expand in a Taylor’s series about r i /r = 0, the electric field formula to 2nd order in r i /r ....
View
Full
Document
This note was uploaded on 11/16/2011 for the course PHY 2053 taught by Professor Buchler during the Fall '06 term at University of Florida.
 Fall '06
 Buchler
 Physics, Charge

Click to edit the document details