Question

the dimensional formula of relative density is

Answer 1

The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m). It is commonly represented by the Greek letter ρ, rho. where, R= resistance, A= area of cross section, l= length *provided the material have Uniform geometrical dimentions. Original Formula : R=ρ(l/A) , where ρ is a proportionality constant.

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Answer 2

Hey there!

Relative density of a substance is defined as the ratio density of substance to density of water.

It has no unit since units of density is division cancel each other.

So, it is dimensionless quantity.

We can represent dimensionless quantity as:

= M⁰L⁰T⁰

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