hey koi class 10 electricity chapter samja dega plz ...... message ke through. muje kich samaj nhi aa rha resistivity vagera ............
Answers
Answer:
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Explanation:
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Answer:
Electrical resistivity is a key parameter for any material used in electrical circuits, electronic components and many other items.
Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction.
Resistivity may also be referred to as the specific electrical resistance, or volume resistivity, although these terms are less widely used.
Although materials resist the flow of electrical current, some are better at conducting it than others.The resistivity is a figure that enables comparisons of the way in which different materials allow or resist current flow.
To enable resistivity figures to be meaningful, specific units are used for resistivity, and there are formulas for calculating it and relating it to the resistance in Ohms for a given size of material.
Materials that conduct electrical current easily are called conductors and have a low resistivity. Those that do not conduct electricity easily are called insulators and these materials have a high resistivity.
The resistivity of different materials plays a major role in selecting the materials used for electrical wire, within many electronic components including resistors, integrated circuits and many more.
Resistivity definition & units
The electrical resistivity of a specimen of a material may also be known as its specific electrical resistance. It is a measure of how strongly a material opposes the flow of electric current.
Resistivity definition:
The resistivity of a substance is the resistance of a cube of that substance having edges of unit length, with the understanding that the current flows normal to opposite faces and is distributed uniformly over them.
The electrical resistivity is the electrical resistance per unit length and per unit of cross-sectional area at a specified temperature.
Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction.
The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m). It is commonly represented by the Greek letter ρ, rho.
Although the SI resistivity unit, the ohms metre is generally used, sometimes figures will be seen described in terms of ohms centimetres, Ω⋅cm.
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