Question

Two nichrome wires P and Q have the same thickness but P is
longer than Q. which of the two wires has more resistivity? why?​

Answer 1

Answer:

both wire has equal resistivity,

resistivity is the resistance on a unit area so length and cross sectional area will not depend on depend Resistivity.

Resistivity changes only when the material of the conductor changes.

In the question both wires P and Q are of nichrome so both has equal Resistivity.

but wire P has bigger resistance

because resistance depends upon the meterial,cross sectional area and the length of the conductor.