How do you classify the physical quantities on the basis of dimension?

1.	How do you classify the physical quantities on the basis of dimension?
Answer» (I) Dimensional variables: Physical quantities, which possess dimensions and have variable values are called dimensional variables. Examples are length, velocity, and acceleration etc. (II) Dimensionless variables: Physical quantities which have no dimensions, but have variable values are called dimensionless variables. Examples are specific gravity, strain, refractive index etc. (III) Dimensional Constant: Physical quantities which possess dimensions and have constant values are called dimensional constants. Examples are Gravitational constant, Planck’s constant etc (IV) Dimensionless Constant: Quantities which have constant values and also have no dimensions are called dimensionless constants. Examples are n, e, numbers etc.

Answer»

(I) Dimensional variables:

Physical quantities, which possess dimensions and have variable values are called dimensional variables. Examples are length, velocity, and acceleration etc.

(II) Dimensionless variables:

Physical quantities which have no dimensions, but have variable values are called dimensionless variables. Examples are specific gravity, strain, refractive index etc.

(III) Dimensional Constant:

Physical quantities which possess dimensions and have constant values are called dimensional constants. Examples are Gravitational constant, Planck’s constant etc

(IV) Dimensionless Constant:

Quantities which have constant values and also have no dimensions are called dimensionless constants. Examples are n, e, numbers etc.

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