A wire of resistivity $$\displaystyle \rho $$ is stretched to double its length. How does it affect the resistivity?
Resistivity will remain same
Resistivity will get doubled
Resistivity will be four times
Resistivity will be halved
The correct option is A Resistivity will remain same
Resistivity is a property of a material that does not depend on the dimensions of the conductor but varies with temperature. Thus resistivity will remain the same even if the length of the wire is doubled.