An electric dipole consists of two charges of equal magnitude and opposite sign separated by a distance 2a as shown in the figure below. The dipole is along the x axis and is centered at the origin.The electric potential at point R on the positive x axis is given by the following equation:2kegaVR = K₂ Z = K₂VR = limWhen x is much greater than a, the following approximation can be used:2k ga2kegax2-a²(x >> a)+²R+x>>aV =(a) Use the information above to find the electric potential created by the dipole described above at the point (3a, 0). (Use any variable or symbol stated above along with the following as necessary: K₂.)(b) By what percentage does your answer differ from the result of the approximate expression that is valid when x is much greater than a.%

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(a) Use the information above to find the electric potential created by the dipole described above at the point (3a, 0). (Use any variable or symbol stated above along with the following as necessary: Ke.) V= (b) By what percentage does your answer differ from the result of the approximate expression that is valid when x is much greater than a.

(a) Use the information above to find the electric potential created by the dipole described above at the point (3a, 0). (Use any variable or symbol stated above along with the following as necessary: Ke.) V= (b) By what percentage does your answer differ from the result of the approximate expression that is valid when x is much greater than a.

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ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

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Question

An electric dipole consists of two charges of equal magnitude and opposite sign separated by a distance 2a as shown in the figure below. The dipole is along the x axis and is centered at the origin.
The electric potential at point R on the positive x axis is given by the following equation:
2kega
VR = K₂ Z = K₂
VR = lim
When x is much greater than a, the following approximation can be used:
2k ga
2kega
x2-a²
(x >> a)
+²
R
+
x>>a
V =
(a) Use the information above to find the electric potential created by the dipole described above at the point (3a, 0). (Use any variable or symbol stated above along with the following as necessary: K₂.)
(b) By what percentage does your answer differ from the result of the approximate expression that is valid when x is much greater than a.
%

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