A wire is stretched to four times of its length its strain is
Correct answer: C. 3
- A. 0.5
- B. 4
- C. 3
- D. 1
Explanation
As, Strain= ΔL/Lwhere, ΔL=4L-L=3LSo, the strain is: Strain= ΔL/L =3L/L =3So, the strain is 3. This is a unitless quantity as it is a ratio of lengths.
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About Young's Modulus and Stress-Strain
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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