**Unformatted text preview: **not zero (Ampere’s law-Monday), but it is Gauss’s law that tells us that the divergence of B is zero, . = ⋅ ∇ B Show the vector identity ) ( = × ∇ ⋅ ∇ A and hence conclude that B can be written as the curl of a magnetic vector potential . ), ( A B where r A × ∇ = The physical significance of this magnetic vector potential is not as straightforward to understand as the electric scalar potential, but you will see this again in more advanced E&M courses so it helps to be aware of this concept....

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- Fall '07
- Evrard
- Vector Calculus, Electrostatics, Magnetic Field, Ampere, magnetic vector potential