The result is although the wire's resistivity doesn't change, its resistance does.
Considering the formula for a material's resistance:
R=pL/A
R is directly proportional to L and inversely proportional to A, as can be seen. Be aware that "rho" is a material-specific and intensive attribute (meaning this value will not change if the material is only physically altered). Remember that A = This implies that the relationship between R and the square of r is inverse. When the wire is stretched, the impacts on length are less noticeable than the effects on r. Therefore the wire'sresistance increases, but its resistivity stays the same.
