Question

A wire of length L and resistance R is sterched so that its length is doubled and the area of cross section is havled.(a)How will its resistance change?(b)How will its resistivity change?

Answer 1

Answer:

If a wire of Length L and resistance R is stretched so that its length is doubled and the area of cross section is halved then

a. its resistance will increase 4 times.

b. its resistivity will not change as it does not depend on length and area, its a property of the material