Which statements are true for the resistivity of a metal conductor:
It depends on the temperature of the material.
It becomes smaller as the cross-sectional area of the material becomes smaller.
It is positive for copper but negative for carbon.
It has units of ohms/meter.
It depends on the electronic structure of the material.
It is an intrinsic property of the conductor and is independent of the voltage applied to it.
I know that the first is true and the 2nd and 4th are false but i cant figure out the rest...