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  • Give an example of (a) a physical quantity which has a unit but no dimensions (b) a physical quantity which has neither unit nor dimensions. (c) a constant which has a unit. (d) a constant which has no unit.

 Give an example of
(a) a physical quantity which has a unit but no dimensions.
(b) a physical quantity which has neither unit nor dimensions.

(c) a constant which has a unit.
(d) a constant which has no unit.

Answers (2)

(a) A plane angle is an example of a physical quantity which has unit but no dimension since, plane angle = arc/radius in radian & solid angle.

(b) Relative density is a physical quantity which neither has neither units nor dimension since µr (relative density) is a ratio of same physical quantities.

(c) Gravitational constant (G) and Dielectric constant (k) are an example of constant that have a unit.

G=6.67 \times 10^{-11}N-m^{2}-kg

k=9 \times 10^{9}N-m^{2}-C^{-2}(Vacuum)

(d) Examples of the constant that has no units are Reynolds no. & Avogadro’s no.

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infoexpert22

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(a) A plane angle is an example of a physical quantity which has unit but no dimension since, plane angle = arc/radius in radian & solid angle.

(b) Relative density is a physical quantity which neither has neither units nor dimension since µr (relative density) is a ratio of same physical quantities.

(c) Gravitational constant (G) and Dielectric constant (k) are an example of constant that have a unit.

G=6.67 \times 10^{-11}N-m^{2}-kg

k=9 \times 10^{9}N-m^{2}-C^{-2}(Vacuum)

(d) Examples of the constant that has no units are Reynolds no. & Avogadro’s no.

Posted by

infoexpert22

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