Two wires, one of copper and other of iron, are of the same length and same radius. Which will have more resistance? Give reason.

Iron has a higher resistivity than copper, which has a lower resistance. As a result, the higher the resistivity, the larger the resistance; conversely, the lower the resistivity, the lower the resistance. As a result, iron wire of the same length and radius has higher resistance than copper wire of the same length and radius.