Thus at -200 deg.

C.
copper is a better conductor than silver.

The resistance diminishes with the temperature, and, down to about -200 deg., this diminution is almost linear, and it would seem that the resistance tends towards zero when the temperature approaches the absolute zero.

But, after -200 deg., the pattern of the curves changes, and it is easy to foresee that at absolute zero the resistivities of all metals would still have, contrary to what was formerly supposed, a notable value.
Solidified electrolytes which, at temperatures far below their fusion point, still retain a very appreciable conductivity, become, on the contrary, perfect insulators at low temperatures.

Their dielectric constants assume relatively high values.MM.Curie and Compan, who have studied this question from their own point of view, have noted, moreover, that the specific inductive capacity changes considerably with the temperature.
In the same way, magnetic properties have been studied.