- #1

Philosophaie

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[tex]\vec{B} = \nabla * \vec{A} = (B_x, B_y,B_z)[/tex]

[tex]\vec{E} = -\nabla*\phi-\frac{\partial \vec{A}}{\partial t} = (E_x,E_y,E_z)[/tex]

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- Thread starter Philosophaie
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- #1

Philosophaie

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[tex]\vec{B} = \nabla * \vec{A} = (B_x, B_y,B_z)[/tex]

[tex]\vec{E} = -\nabla*\phi-\frac{\partial \vec{A}}{\partial t} = (E_x,E_y,E_z)[/tex]

- #2

UltrafastPED

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- #3

Philosophaie

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How do you solve for ##\vec{A}## and ##\phi## for a planet or star acting like a dipole or current loop? For the sun the equations only are valid every 11 years or so because the polarity reverses. Also the earth does not have a true North North Pole it is somewhere in Siberia.

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- #4

UltrafastPED

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http://hanspeterschaub.info/Papers/UnderGradStudents/MagneticField.pdf

- #5

Philosophaie

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They look like this ##g^m_n## and ##h^m_n##

- #6

UltrafastPED

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See footnote 2; but NASA is shutdown this week.

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