Question

You are given three wires $A,B$ and $C$ of the same length and cross section. They are each stretched by applying the same force to the ends. The wire A is stretched least comes back to its original length when the stretching force is removed. The wire $B$ is stretched more than $A$ and also comes back to its original length when the stretching force is removed. The wire C is stretched most and remains stretched even when the stretching force is removed. The greatest Young's modulus of elasticity is possessed by the material of a wire

• A. A
• B. B
• C. C
• D. All have the same elasticity

Answer 1

The correct option is A A

By Yoeung's modulus af Elasticity.

$y=\frac{F_1}{A}\cdot \frac{l}{\Delta l}=\frac{\text{Stress}}{\text{strain}}$

As given in question $F,l,A$ are same for all

3 wires.

$\therefore$ for Greatest $Y$, $△$ l should be least.

Therefere. for wire A. gretest Ycung's modulus of elasticity is possessed by. wire $A$.