# What is meant by electrical resistivity of a material derive its SI unit on what factors does it depend?

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and cross sectional area is 1m²,then resistance of conductor is called resistivity. put l=1m and A=1m². this resistance is called resistivity. resistance of a conductor depends on dimensions of the conductor(volume ,length,area).

## What is meant by electrical resistivity of a material derive its SI unit state the factors on which the resistance of a conducting wire depends?

Resistivity is defined as the electrical resistance of a conductor of unit cross-sectional area and unit length. The resistance of any conductor is directly proportional to the length of the conductor and inversely proportional to the area of cross-section of the conductor. SI unit of resistivity is ohm-meters.

## What is meant by electrical resistivity of a material and derive its SI unit?

The electrical resistivity is the electrical resistance per unit length and per unit of cross-sectional area at a specified temperature. The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m).

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## What is meant by electrical resistivity of a material name the factors on which the resistance of a wire depends?

If I is the length of the conductor, A its area of the crosssection and R its total resistance then, Where P is a constant of proportionality and is called the electrical resistivity of the material of the conductor. The SI unit of resistivity is Ohm meter.

## What is meant by electrical resistivity?

resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length. … Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l.

## What is meant by electrical resistivity of a material derive it’s SI unit if the length of a material is doubled what will be the change in its resistivity?

Electrical resistivity of the material of a conductor is the resistance offered by the conductor of length 1 m and area of cross-section 1 m2. Resistance of wire is doubled if its length is doubled. Hence current is reduced to half.

## What is electrical resistivity derive an expression for the resistance of a metallic wire in terms of resistivity?

(a) The resistance of a metallic wire in terms of resistivity is given as: R=Aρl. Here, ρ is the resistivity of wire, l is the length, A is the area of cross-section and R is the resistance of wire. (b) I=2m. A=1.

## What is the electrical resistivity of the material of the conductor?

Thus, electrical resistivity of a material of a conductor is defined as the resistance offered by unit length and unit cross-sectional area of a wire of the given material.

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