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A Simple Model for Atomic Nuclei: The Deformed Sphere and its Multipole Moments cover

A Simple Model for Atomic Nuclei: The Deformed Sphere and its Multipole Moments

Published in Electrodynamics / Electrostatics / Multipole Moments
Tags: Rotational Symmetry / Quadrupole Moment / Legendre Polynomials

We will calculate the first three multipole moments of a deformed charged sphere. Such a charge distribution is often used to model nuclei and understand their stability.

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Multipole Moments in Rotational Symmetry cover

Multipole Moments in Rotational Symmetry

Published in Electrodynamics / Electrostatics / Multipole Moments
Tags: Rotational Symmetry / Quadrupole Moment / Legendre Polynomials

Starting from specific examples, we find the general form of the multipole moments for charge distributions with rotational symmetry.

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A Magnetic Sphere with Surface Current cover

A Magnetic Sphere with Surface Current

Published in Electrodynamics / Magnetostatics / Magnetic Fields in Matter
Tags: Magnetostatic Potential / Legendre Polynomials / Boundary Conditions

Using the magnetostatic potential can be extremely useful to calculate magnetostatic problems. In this example we use it to derive the magnetic field of a sphere with surface current.

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A Dielectric Sphere in a Homogeneous Electric Field cover

A Dielectric Sphere in a Homogeneous Electric Field

Published in Electrodynamics / Electrostatics / Dielectrics
Tags: Permittivity / Legendre Polynomials / Boundary Conditions / Fröhlich Condition

The electrostatic potential of a dielectric sphere subject to an external field is calculated.

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