A semiconductor is cooled form `T_(1)K` to `T_(2)K`. Its resistance

A semi-conductor is cooled from T_1K to T_2K . Its resistance

A piece of aluminium and germanium each are cooled from T_(1)K to T_(2)K . The resistance of

Two pieces one of germinium and the other of aluminium are cooled from T_(1) K to T_(2) K . The resistance of

Copper and silicon is cooled from 300 K to 60 K, the specific resistance