Question

R=pl/A

R1=p2×2l/A

R1=4R1

The resistivity first change it remains constant as it depends only upon temperature and not shape and size

I hope this helps ( ╹▽╹ )
what does "p" mean in this

Answer 1

Answer: 'p' (pronounced as 'ro' or 'row') is the resistivity of the object.

Explanation:

Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction.

You can understand this as a forces that avoids the current to flow easily in a body.

If a body is a good conductor, it means it has low resistivity and if the body is a bad conductor or an insulator, the resistivity is more.