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Starting form Maxwell's equations for magnetostatics, vector potential is introduced and the Biot-Savart Law is derived.

In this section we compute the leading term in the magnetic field of a current loop at large distances and obtain an expression for the magnetic moment of the loop.

Relationship between the normal to a surface and the orientation of its boundary curve, as they should appear in Stokes theorem are explained.

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• This repository of NOTES in quantum mechanics.
• Created for internal use of PROOFS PROGRAM
• Primarily useful for  content authors.

The meaning of charge conservation is discussed. It is known to be mathematically represented by  the equation of continuity. It is argued that special relativity requires that there should be  a 'current' associated with  every conserved quantity.

Starting from Lorentz force per unit volume on a current carrying conductor due to magnetic field is shown to be \(\vec{j}\times\vec{B}\)

Expressions for  force on line  and volume elements of a current in magnetic field are derived.