GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The point where the spring expands in a non-linear way to the point the spring does not come back to its original shape
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The point where the spring expands in a linear way and it comes back to its original shape
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Either A or B
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None of the above
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Detailed explanation-1: -The proportional limit is the maximum stress that a dental material sustains without any deviation, or the magnitude of elastic stress above which plastic deformation occurs. Below the proportional limit, no permanent deformation occurs; and when the stress is removed, the structure returns to its original dimension.
Detailed explanation-2: -What Is the Proportional Limit? The proportional limit is defined as the highest stress at which stress and strain are directly proportional so that the stress-strain graph is a straight line such that the gradient is equal to the elastic modulus of the material.
Detailed explanation-3: -For a given spring and other elastic objects, the extension is directly proportional to the force applied. For example, if the force is doubled, the extension doubles. This works until the limit of proportionality is exceeded.