Question

please answer, no spam​

Answer 1

Explanation:

The resistivity of material is defined as the resistance of a conductor made of that material of unit length and unit cross-sectional area.

Using, (see above image )

R is doubled while V remains unchanged.

Hence, current becomes half.

hopefully its helped u dear :)

Answer 2

$r = p \times \frac{l}{a} \\ \\ v = r \: t \:$

may its helpful for you dear :)