Length of an iron wire is L and area of cross-section is A . increase in length is l on applying for

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8.Mechanical Properties of Solids

easy

The length of an iron wire is $L$ and area of cross-section is $A$. The increase in length is $l$ on applying the force $F$ on its two ends. Which of the statement is correct

A

Increase in length is inversely proportional to its length $L$

B

Increase in length is proportional to area of cross-section $A$

C

Increase in length is inversely proportional to $A$

D

Increase in length is proportional to Young's modulus

Solution

(c) $l = \frac{{FL}}{{YA}} \Rightarrow l \propto \frac{1}{A}$

Standard 11

Physics

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