P1.5a.Obtain the expression for the time-harmonic retarded potential A for a current element of small length h located on the z-axis as shown in the figure.
b.Hence obtain the electric and magnetic fields at P. Assume that the current in the filament is I0(A).
c.In the far zone, that is, for R ≫ λ, h ≪ λ, obtain E , H , E × H, and ⟨S⟩.
P1.6Lecture ...
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