Classification of materials based upon resistance
  Classification of materials based upon the resistance:-    1.        Conductors:   -           Materials which offer least resistance to flow of electrons through them.   -           Example: Silver,Copper,Aluminium   -           Resistivity range: 10^(-8) to 10^(-3)   -           Applications: Cables core etc.   -           Note1: Resistance of a conductors increases with the increase in temperature.   -           Note2: Human body and earth acts as conductors.         2.        Insulators:   -           Materials which offer very high resistance to flow of electrons through them.   -      ...