Multiple choice

A circular rod of length ‘L’ and area of cross-section ‘A’ has a modulus of elasticity ‘E’ and coefficient of thermal expansion ‘$\alpha$’. One end of the rod is fixed and other end is free. If the temperature of the rod is increased by $\triangle$T, then

  1. stress developed in the rod is E$\alpha$ $\triangle$T and strain developed in the rod is $\alpha$ $\triangle$T

  2. both stress and strain developed in the rod are zero
  3. stress developed in the rod is zero and strain developed in the rod is $\alpha$$\triangle$T
  4. stress developed in the rod is E$\alpha$ $\triangle$T and strain developed in the rod is zero
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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