The following four wires of length L and radius r are made of the same material. Which of these will have the largest extension, when the same tension is applied?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
: Young's modulus,
or
where the symbols have their usual meaning
As the four wires are made of the same material, therefore Young's modulus is the same four wires. As the T and Y are the same for the four wires.
is maximum for wire of length 
and radius 
.
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