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On the basis of resistivity, substances are classified as conductors, insulators, and resistors. Conductors are the substances which have very low electrical resistance. Insulators are the substances which have infinitely high resistance.

What is the resistivity of materials?
Resistivity is the resistance per unit length and cross-sectional area. It is the property of the material that opposes the flow of charge or the flow of electric current. The unit of resistivity is ohm meter. We know that R = ρ L / A.

What are the classifications of material in terms of conductivity?
Materials are classified as metals, semiconductors, and insulators. Metals are the most conductive and insulators (ceramics, wood, plastics) the least conductive. Electrical conductivity tells us how well a material will allow electricity to travel through it.

What is resistivity of a material ?
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 resistivity of a material ?
The resistance per unit length and cross-sectional area is called resistivity. It is constant for each material. The resistivity changes from material to material. Which means it is proportional to the area of cross-section and inversely proportional to the length of the conductor.

Why is resistivity called a material property?
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 resistivity ?
The electrical resistivity of a material is defined as the resistance offered to current flow by a conductor of unit length having a unit area of cross-section. RA L.

What is material classification?
Materials can be classified into four main groups: metals, polymers, ceramics, and composites. Metals are materials on the left side of the periodic table of chemistry and include ferrous metals that have iron inside them (including steel) and nonferrous metals that don't.

How do we classify conducting materials on the basis of their resistivity?
Answer. on the basis of resistivity substances are classified as conductors, insulators and resistors. 1. conductors are the substances which have very low electrical resistance.

What is resistivity in physics definition?
resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length. A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents. High resistivity designates poor conductors.

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