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## Main Question or Discussion Point

Im doing some study on scalar and vector potentials in the area of electromagnetics, and the author of the book derived this equation

[tex]\vec{E} = -j\omega\vec{A} - \nabla\phi[/tex]

where [tex]\vec{A}[/tex] = vector potential and

[tex]\phi[/tex] = scalar potential and

[tex]\vec{E}[/tex] = time harmonic form of electric field

The author goes on to make a statement saying this may be a familiar result, however Im not sure exactly what he is referring to ?? Can anyone shed some light ?

[tex]\vec{E} = -j\omega\vec{A} - \nabla\phi[/tex]

where [tex]\vec{A}[/tex] = vector potential and

[tex]\phi[/tex] = scalar potential and

[tex]\vec{E}[/tex] = time harmonic form of electric field

The author goes on to make a statement saying this may be a familiar result, however Im not sure exactly what he is referring to ?? Can anyone shed some light ?