Question

which metal has least resistivity 20°c​

Answer 1

Explanation:

Conductors allow the maximum electric current to pass through them and so they have the least resistivity or most conductivity. On the other hand, an insulator does not allow the electric current to pass through it, thus it has the most resistivity. Alloys have more resistivity than the conductors but less than the insulator.

Thus correct order of resistivity is : Conductors → Alloys → Insulators

Answer 2

Platinum..It is rarely found on earth nd it doesn't form resistance surface on it..