physics
posted by isabelle .
Which statements are true for the resistivity of a metal conductor:
It depends on the temperature of the material.
It becomes smaller as the crosssectional 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...
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