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Which formula gives Young's modulus Y of a wire of length L and area A?
AY = (F x A) / (L x delta L)
BY = (A x delta L) / (F x L)
CY = (F x L) / (A x delta L)
DY = (F x delta L) / (A x L)
Answer & Solution
Correct answer: C. Y = (F x L) / (A x delta L)
Y is tensile stress F/A divided by longitudinal strain delta L / L, which simplifies to F L / (A delta L).
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