What is electrical resistivity of a material class 10?

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 electrical resistivity of a material?

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 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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Why is electrical resistivity of a material?

Electrical resistivity (also called specific electrical resistance or volume resistivity) is a fundamental property of a material that measures how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current.

What is electrical resistivity of a material what is its unit and define it?

Answer: The electrical resistivity is defined as the electrical resistance of a conductor of unit length and unit area of cross section through which the current passes. ohm – metre.

What do you mean by electrical resistivity?

The electrical resistivity of a material is defined as the resistance offered to current flow by a conductor of unit length having unit area of cross section. The unit of ρ is ohm−m(Ωm)

What is electrical resistivity used for?

The resistivity method is useful for simultaneously detecting lateral and vertical changes in subsurface electrical properties. Electrical resistivity is also used to delineate 3-dimensional structures with anomalous electrical conductivities.

What is electrical conductivity class 10?

Electric conductivity refers to the measure of how electric current moves within a substance. Also, the greater the electrical conductivity within the material the higher the current density for a given applied potential difference. … For example, the wire conductors need to let current flow as easily as possible.

What is the electrical resistivity of a material what is its unit describe an experiment to study the factors on which the resistance of a conducting wire depends?

What is its unit? Describe an experiment to study the factors on which the resistance of conducting wire depends. Answer: The electrical resistivity of a material is defined as the resistance of a conductor made of that material of unit length and unit cross-sectional area.

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What is an electric current class 10?

Electric current is rate of flow of electric charge or the amount of charge flowing through a particular area in unit time. … In reality, electric current is flow of negatively charges particles called electrons. These flow from negative terminal of the battery to the positive terminal.

What is meant by electrical resistivity of a metal?

Resistivity is defined as resistance of conductor with length 1m and having cross sectional area 1m², R=ρl/A. putting l=1m and A=1m². R=ρ this resistance is called resistivity. Resistance of a conductor depends on dimensions of the conductor(length and area) and resistivity.

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

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).

What is electrical resistivity semiconductor?

Electrical resistivity of a semi- conductor varies very much with the temperature. … Since, the conductivity of electrons increases and hence their resistivity decreases. On the other hand, at low temperature the conductivity of semiconductors decreases and resistivity increases.