Materials which have conductivities in the range of to
ohm-1 m-1are known as:
Insulators
Conductors
Semiconductors
Superconductors
Insulators have conductivity in the range of to
.
Conductors have conductivity in the range of to
.
Semiconductors have conductivity in the range of to
.
Superconductors have zero resistance or infinite conductance.
Option (c) is correct.