What is the Permittivity of copper?

Answer 1

Permittivity and loss tangent of copper filled epoxy

Frost, N.E. McGrath, P.B.
Dept. of Electr. & Comput. Eng., Clarkson Univ., Potsdam, NY;

This paper appears in: Electrical Insulation and Dielectric Phenomena, 1996. IEEE 1996 Annual Report of the Conference on
Publication Date: 20-23 Oct 1996
Volume: 1, On page(s): 303-306 vol.1
Meeting Date: 10/20/1996 - 10/23/1996
Location: Millbrae, CA, USA
ISBN: 0-7803-3580-5
References Cited: 5
INSPEC Accession Number: 5513534
Digital Object Identifier: 10.1109/CEIDP.1996.564687
Posted online: 2002-08-06 20:45:58.0

Answer 2

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If you mean which of the two given alternative propagates signals at higher speed, then it is usually copper conductors. In the case of copper conductor the EM field is actually propagated in whatever medium fills the space between the copper conductors. This is usually (although not always) air with an electric relative permittivity εr of 1. In an optical fibre the EM field propagation is in glass which has an εr value around 5 which results in a propagation speed [=√(1/με)] of less than half that in air

Answer 3

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What is the Permittivity of copper?

Answer 4

I've never heard of a metal having a permittivity associated with it. You can't propagate an EM wave through it and can't use it as an insulator.