Question

A wire of resitance x y double upon Itself Calculate the new resistance and resistivity,​

Answer 1

Explanation:

first if we go through resistivity then resistivity of of a wire is always constant as it depends upon nature of material and temperature only so it will not change

now if you go for doubling the wire itself you will see its length will become half and the area of cross section will become twice...

so the resistance will become one fourth