Question

Sort the elements according to the increasing order of their resistivities.

• A. Aluminium ore
• B. Silver
• C. Iron
• D. Tungsten
• E. Carbon

Answer 1

Among the given elements carbon has the highest resistivity as it is not a very good conductor of electricity. Carbon only in its allotropic form of graphite is known to conduct electricity. After carbon, iron has highest resistivity among the metals given here. Tungsten, the metal used for filament of incandescent bulbs, has resistivity less than iron. Aluminium is a better conductor than tungsten as it has lesser resistivity than tungsten. Among all the metals given here silver has the least resistivity.
Silver < Aluminium < Tungsten < Iron < Carbon.