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BWhy strain is unit less and dimensionless physical quantity?

Answer»

Answer :- Strain is the ratio of two quantities having the same dimension. The ratio of quantities with same dimensions gives merely a numerical value (As you know, a non-zero number divided by the same number results in 1). Because of this, strain has no dimensions

strain is the ratio of change in a quantity by the same quantity...so the quantity is same hence its unit is same..so their dimensions are same...which makes strain a dimensionless quantity



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