A small object with electric dipole moment p is placed in a nonuniform electric field E = E(x)î. That is, the field is in the x direction, and its magnitude depends only on the coordinate x. Let 0 represent the angle between the dipole moment and the x direction. Prove that the net force on the dipole is dE cos 0 dx, F = p acting in the direction of increasing field.

University Physics Volume 2
18th Edition
ISBN:9781938168161
Author:OpenStax
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Chapter5: Electric Charges And Fields
Section: Chapter Questions
Problem 83P: The charge per unit length on the thin rod shown below is . What is the electric field at the point...
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A small object with electric dipole moment p is placed in
a nonuniform electric field E = E(x)î. That is, the field is
in the x direction, and its magnitude depends only on the
coordinate x. Let 0 represent the angle between the dipole
moment and the x direction. Prove that the net force on the
dipole is
dE
cos 0
dx,
F = p
acting in the direction of increasing field.
Transcribed Image Text:A small object with electric dipole moment p is placed in a nonuniform electric field E = E(x)î. That is, the field is in the x direction, and its magnitude depends only on the coordinate x. Let 0 represent the angle between the dipole moment and the x direction. Prove that the net force on the dipole is dE cos 0 dx, F = p acting in the direction of increasing field.
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