Question

Name a physical quantity which has a unit but no dimension.​

Answer 1

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[A] Quantities having units, but no dimensions : Plane angle,angular displacement, solid angle. These physical quantities possess units but they does not possess dimensional formulas. B a physical quntatity neither having units nor dimensions are trigonometric ratios,strain , specific gravity etc.

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Answer 2

Plane angle,angular displacement, solid angle are the physical quantities which have units but they don't have dimensional formulas.