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JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Elasticity & SHM

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: Steel is used in the construction of buildings and bridges.

Reason R: Steel is more elastic and its elastic limit is high.

In the light of above statements, choose the most appropriate answer from the options given below
  1. (A)Both and are correct but is NOT the correct explanation of
  2. (B) is not correct but is correct
  3. (C)Both and are correct and is the correct explanation of ✓ Correct
  4. (D) is correct but is not correct

Answer: (C)

Solution

Steel is chosen for buildings and bridges because it has a large Young's modulus and a high elastic limit, so it resists deformation and returns to its original shape even under heavy loads. The claim about its use is true, the statement about its elasticity and elastic limit is true, and that high elasticity is precisely the reason it is preferred. Both statements are correct and the second correctly explains the first.

JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Single correct option

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