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Unformatted text preview: Engineering ElectroMagnetics Engineering ElectroMagnetics ECE305, Lecture 9 Dennis McCaughey, Ph.D. 2 March, 2010 03/02/2010 Dennis McCaughey, ECE305, Spring 2010 2 Homework Homework 4.21 4.25 4.29 Due March 16 03/02/2010 Dennis McCaughey, ECE305, Spring 2010 3 The Dipole The Dipole An electric dipole or simply a dipole is the name given to two point charges of equal magnitude and opposite sign, separated by a distance that is small compared to the point P at which we want to know the electric and potential fields. Dipoles are quite important Form the basis for the behavior of dielectric materials 03/02/2010 Dennis McCaughey, ECE305, Spring 2010 4 The Dipole The Dipole (a) The geometry of the dipole: The dipole moment p=Qd, is in the a z direction (b) For a distant point P , R 1 is essentially parallel to R 2 , and we find R 2R 1 = dcos(theta) 03/02/2010 Dennis McCaughey, ECE305, Spring 2010 5 What Next? What Next? Find E and V Should we find the E fields resulting from each charge first and then add? Would it be easier to find the total potential field first?...
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This note was uploaded on 09/13/2011 for the course ECE 305 taught by Professor Staff during the Spring '08 term at George Mason.
 Spring '08
 Staff
 Electromagnet

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