Explain the variation of conductivity of a metallic conductor with temperature?

Explain the term variation?

What are metallic conductors ?

The variation of resistance of a metallic conductor with temperature is shown in figure. Calculate the temperature coefficient of resistance from the graph.

Explain the variation of radii in a period.

Explain the variation in molar conductivity of weak electrolyte with concentration.

Explain with the help of a graph, the variation of conductivity with temperature for a metallic conductor?

The conductivity of metals increases with:

What is the effect of temperature on the electrical conductivity of metallic conductors ?