If in case $A$, elongation in wire of length $L$ is $l$, then for same wire elongation in case $B$ will be ......
A$4 l$
B$2l$
C$l$
D$l / 2$
Medium
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C$l$
c (c)
Since tension in both cases is same and all other parametrs $(Y, A, L)$ are also same $\Rightarrow$ Elongation will be same in both cases.
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