Question

what is resistivity mean in physics?​

Answer 1

$\large\red{\underline{{\boxed{\textbf{Resistivity\: Meaning}}}}}$

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${\bold{{\underline{ Resistivity \: in \: Physics \: :}}}}$

The resistivity offered by a cube of a substance having side of 1 when current passes through perpendicular to the opposite faces is called its resistivity.

The resistivity of a conductor depends upon its nature , length and area of cross section.

It is found resistivity of a conductor is indirectly proportional to the length and depends to the the cross section.

$\red{\bold{{\underline{ Derivation \: of \: Resistivity \: :}}}}$

R ∝ L - (i)

R ∝ 1/A - (ii)

From (i)and (ii) :-

R ∝ L/A

R = ρ (L/A)

• → ρ = Rho (Resistivity constant)
• → R = Resistivity
• → L = Length of conductor
• → A = Area of cross - section

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Answer 2

Explanation:

ResistivityinPhysics:

The resistivity offered by a cube of a substance having side of 1 when current passes through perpendicular to the opposite faces is called its resistivity.

The resistivity of a conductor depends upon its nature , length and area of cross section.

It is found resistivity of a conductor is indirectly proportional to the length and depends to the the cross section.

\red{\bold{{\underline{ Derivation \: of \: Resistivity \: :}}}}

DerivationofResistivity:

R ∝ L - (i)

R ∝ 1/A - (ii)

From (i)and (ii) :-

R ∝ L/A

R = ρ (L/A)

→ ρ = Rho (Resistivity constant)

→ R = Resistivity

→ L = Length of conductor

→ A = Area of cross - section