Question

wo wires one of Copper and another of Iron, have the same diameter and carry the same current. In which drift velocity will be more?

Answer 1

Copper is a better conductor than iron, which means current can flow easier (with less resistance) through copper. This is an inherent property of a material.

The outer electrons of copper atoms are more easily displaced than those of iron and so a flow of electricity (electrons) occurs more easily. We express this by saying that the copper has a lower electrical resistance than iron. For the same reason, copper allows heat to pass through it more easily than iron; in this case we say that its thermal conductivity is better.

Hence, the wire made of iron will have the maximum resistance.

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