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?

Options

A. Increase in length is proportional to area of cross-section.
B. Increase in length is inversely proportional to its length.
C. Increase in length is inversely proportional to area of cross-section.
D. Increase in length is proportional to Young's modulus.

Answer

C

Explanation

`l=(FL)/(YA)`
`rArr" "lprop(l)/(A)`