Question

Describe a method to determine Young's modulus of a material of thin wire.

Answer 1

we know, Young's modulus is defined as the ratio of stress to strain.
so, Young's modulus = stress/strain.
take a specific length, L of any material wire of cross section area A, a load F and due to load , change in length of wire is ∆L .
then, Young's modulus can be determined by using formula , Y = FL/A∆L
or Y = FL/πr²l [ here l = ∆L]

for removing error use formula, ∆Y/Y = ∆F/F + ∆L/L + 2∆r/r + ∆l/l

then, Young's modulus will be Y ± ∆Y

Answer 2

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