Define resistivity of a material. How are materials classified based on resistivity?
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Resistivity or the specific resistance is defined as the resistance of the material of the unit area and unit area of the croos section.
S.I. unit of the Resistivity is Ω-m.
Formula to calculate the Resistivity is ⇒
ρ = Ra/l
where, a is the area of the cross-section.
R is the Resistance.
l is the length.
The materials are classified into three types on the basis of the Resistivity. They are ⇒
1. Semiconductors.
2. Insulators.
3. Conductors.
Hope it helps.
S.I. unit of the Resistivity is Ω-m.
Formula to calculate the Resistivity is ⇒
ρ = Ra/l
where, a is the area of the cross-section.
R is the Resistance.
l is the length.
The materials are classified into three types on the basis of the Resistivity. They are ⇒
1. Semiconductors.
2. Insulators.
3. Conductors.
Hope it helps.
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