ECE106 Lecture Notes - Lecture 11: Electric Dipole Moment

• School: University of Waterloo
• Department: Electrical and Computer Engineering
• Course: ECE106
• Professor: All

Document Summary

The product 2aq is called the dipole moment, also known as p = qd . If the point we considering is arbitrary, then we have: E =e 1 + e 2 (+q)( d /2 + r) 2 3/2 (d/2)2 + r2 + 2 d /2 r. | d /2 + r|3 (+q)( d /2 + r) r3 3 r (d r) Use the same approximation to simplify the q term and combine them together, The e field drops as 1 for the dipole instead of 1 for a single charge. We can define a term called electric dipole moment , p as charge multiplied by displacement (p = qd ), and rewrite e as: r3 r2.