Free Young's Modulus and Stress-Strain MCQs with Answers
11 Young's Modulus and Stress-Strain MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Stress and strain describe how a solid deforms under an applied force, while Young's modulus is the ratio of tensile stress to tensile strain within the elastic limit. The topic includes elastic and plastic behaviour, Hooke's law, the stress strain graph and the difference between stiffness, strength and breaking stress.
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11. Which one of the following physical quantity does not have the dimension of force per unit area:
- A. Stress
- B. Strain
- C. Young modulus
- D. Pressure
Explanation: The strain unit is dimensionless. It is the ratio between the length shift and the initial length, so it is unit-less. Thus B, strain, is the correct option
Correct answer: Strain