Question

a wire is stretched to two times its original length. find its new resistance

Answer 1

let the length of wire be x
wire stretched 2 times so.,
2×x=2x
new resistance = 2x

pls mark as brsinliest

Answer 2

OLD RESISTANCE =R
R=PL/A
NEW RESISTANCE =R'
L'=2L
R'=PL'/A'
VOL=VOL'
AL=A'L'
AL=A'2L
A=2A'
A/2=A'
R'=PL'/A'
R'=P2L/2/A
R'=1/4PL/A
R'=1/4R
R'=R/4