A) Elongation is inversely proportional to length
B) Elongation is directly proportional to cross section A
C) Elongation is inversely proportional to cross-section
D) Elongation is directly proportional to Young's modulus
Correct Answer: C
Solution :
[c] According to Hooke's law \[Stress\text{ }\propto \text{ }strain\text{ }i.e.,\frac{F}{A}\propto \frac{\Delta l}{l}\] \[\Rightarrow For\,same\,F\And \,l,\,\Delta l\propto \frac{l}{A}\]You need to login to perform this action.
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