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Tsunami
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I'm trying to find some sort of simple derivation of these laws in 2d, using the integral expressions of the Maxwell equations.
For 2d Coulomb, I found this:
Imagine a rod of infinite length along the z-axis, carrying a charge q which is uniformly divided:
rho (the charge/volume) = lambda*dz*delta(x)*delta(y)
with dq= lambda*dz
So, using the electrical Gauss' law, Er being the value of E in radial direction:
eps0*Er*2*pi*r*dz = lambda*dz
Er= lambda/(eps0*2*pi*r)
Er =-dV/dr
=> V= -lambda/(2*eps0)*ln(r)
So, Coulomb's law would be, with pi(r´) being the electrical charge of the surface evaluated in point r´, en ds´ being the surface that is integrated:
V(r) = -lambda/(2*eps0)* int ( ln(r-r´) , ds´) ?
Does that make any sense? Or is this way off the mark?
And for the Biot-Savart law in the same manner, will the vector potential be something analogous to this thing?
Thank you,
W.
For 2d Coulomb, I found this:
Imagine a rod of infinite length along the z-axis, carrying a charge q which is uniformly divided:
rho (the charge/volume) = lambda*dz*delta(x)*delta(y)
with dq= lambda*dz
So, using the electrical Gauss' law, Er being the value of E in radial direction:
eps0*Er*2*pi*r*dz = lambda*dz
Er= lambda/(eps0*2*pi*r)
Er =-dV/dr
=> V= -lambda/(2*eps0)*ln(r)
So, Coulomb's law would be, with pi(r´) being the electrical charge of the surface evaluated in point r´, en ds´ being the surface that is integrated:
V(r) = -lambda/(2*eps0)* int ( ln(r-r´) , ds´) ?
Does that make any sense? Or is this way off the mark?
And for the Biot-Savart law in the same manner, will the vector potential be something analogous to this thing?
Thank you,
W.