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NEETPhysicsMechanical Properties of Solids

Two wires A and B of same length are made of same material. Load (F) vs. elongation (x) graph for these two wires is shown in the figure. Then which of the following statement(s) is / are true?

Options

  1. AThe cross-section area of A is greater than that of B .
  2. BYoung's modulus of A is greater than Young's modulus of B .
  3. CThe cross-sectional area of B is greater than that of A .
  4. DYoung's modulus A is more than that of B.

Correct answer

A. The cross-section area of A is greater than that of B .

Step-by-step solution

same material have identical Young's Modulus. For a given strain and Young's Modulus. stress in same aligned & F_A A_A = F_B A_B F_A F_B = A_A A_B & as F_A>F_B, A_A>A_B aligned

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