Question

Define young's modulus of elasticity?

Answer 1

Young modulus of elasticity(Y) is defined as the " ratio of the normal stress to the longitudinal strain
i.e.
Y = Normal stress / longitudinal strain
= F/Ax L/ l
FL/ lA
hopes helps ❤❤❤

Answer 2

$\textbf{Answer :}$

$\huge\textbf{Young's Modulus of Elasticity :}$

It is the ratio of tensile stress to the longitudinal strain within elastic limit.

It is denoted by Y (Young's Modulus).

$Y$ = $\frac{Tensile\:stress}{Longitudinal\:strain}$

Let a force (F) be applied on a wire of original length (l) and area of cross section (a).

If ∆l is the increase in length then,

Y = [F/a] ÷ [∆l/l]

Y = Fl ÷ ∆la