Question

A wire of length l area a is made into wire of double its length by
(1) attaching a similar wire
(2) melting the existing wire
If the original resistivity is 'rho' what will be the new resistance and resistivity.

Answer 1

Resistivity is same as it depends on the nature of the material of the wire.

Answer 2

I think it will be 2)melting the existing wire
it is more powerful.

I hope so it was helpful