Question

A 1-m copper wire with a radius of 0.5 mm is stretched to a distance of 2 m. What is the fractional change in resistance ΔR/R as the wire is stretched?

Answer 1

@shivam_bhalla

Answer 2

@experimentx

Answer 3

not really sure ... the density of copper remains constant, and the mass is constant -> which means the volume is also constant. equate two volumes of cylinder you might get an answer.

Answer 4

i have to choose one of these ?
3.0
2.5
1.0
4.3
5.4

Answer 5

why are you always after the answer ... process of finding the answer is really important.