When the area of cross-section of a conductor is doubled, its resistance becomes:

If the diameter of a resistance wire is halved, then its resistance becomes:

The resistivity of a certain material is 0.6 Ωm. The material is most likely to be:

The resistivity of copper metal depends on only one of the following factors. This factor is :

If the area of cross-section of a resistance wire is halved, then its resistance becomes :