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(D) Strain is defined as the ratio of change in dimension to the original dimension. Since it is a ratio of two similar physical quantities,it is a di

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Strain

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(D) Strain is defined as the ratio of change in dimension to the original dimension. Since it is a ratio of two similar physical quantities,it is a dimensionless quantity.Angular velocity has dimensions of $[T^{-1}]$.Linear momentum has dimensions of $[MLT^{-1}]$.Angular momentum has dimensions of $[ML^2T^{-1}]$.Therefore,the correct option is $(d)$.

Which of the following physical quantities has no dimensions?

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