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Which of the following is a dimensionless quantity?

Which of the following is a dimensionless quantity? Correct Answer Strain

Explanation:

Strain

The strain of a deformed body is defined as the ratio of the change in length of the body due to the deformation to its original length.

If l is the original length and dl the change in length occurred due to the deformation, the strain e induced is given by

Strain, ϵ = dl / l

It has no unit i.e., dimensionless.

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