Let a line charge have linear charge density
The electric and magnetic fields are then given in cgs by
and in MKS by
where
is the permittivity of free space and 
is the permeability of free space.
(1)
The electric and magnetic fields are then given in cgs by
(2)
(3)
and in MKS by
(4)
(5)
where
is the permittivity of free space and is the permeability of free space.
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