Question

An electric wire is cut to reduce to half its length .1)resistance .2) resistivity change

Answer 1

1) R is directly proportional to length
therefore R=1/2
2) P resistivity do not depend on length

Answer 2

Answer:

resistance

Explanation:

As we know that resistance depends upon length and area,length is halved so will be resistance.But resistivity remains unchanged because,it depends upon material used and external factors such as temperature.