Therefore,resistance will be halved Now the specification resistance of the wire does nt depend on the geometry of the wire hence it remains unchanged. Aliter
:R∝
1
r2
⇒
R2
R1
=
l2
l1
×
r12
r22
=(
2
1
)×(
1
2
)2=
1
2
⇒R2=
R1
2
,specific resistance doesn't depend upon length and radius