Question

# Two wires $$A$$ and $$B$$ of same dimensions are stretched by same amount of force. Young's modulus of $$A$$ is twice that of $$B$$. Which wire will get more elongation? Enter 1 for A and 2 for B.

Solution

## Youmng's modulus $$\displaystyle =\frac{longitudinal \ stress}{longitudinal \ strain}$$i.e, $$\displaystyle Y=\frac{F/A}{\Delta l /l}$$$$\displaystyle \Delta l=\frac{Fl}{AY}$$$$\therefore \Delta l \propto \frac{1}{Y}$$As $$Y_A=2Y_B$$  so B has more elongation $$(\Delta l)$$Physics

Suggest Corrections

0

Similar questions
View More

People also searched for
View More