The Young's modulus of a given rod of uniform length 𝐿 is given by the relation:
Correct answer: C. F𝐿/𝜋𝑟2𝑙
- A. 𝐹𝐿/𝐴
- B. 𝐹𝐴/L
- C. F𝐿/𝜋𝑟2𝑙
- D. F𝑙/𝜋𝑟2L
Explanation
Young modulus=stress/strain FL/Al where l is the extension
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