Resistivity Formula
The resistivity of a material is defined as the resistance of a conductor of material per unit length and per unit cross-sectional area at a particular temperature.
OR
It is the property of a material that demonstrates how strongly the material resists or conducts electric current. It is denoted by ρ which is called rho. The formula for resistivity is given as,
- ρ = (RA)/l ⇢ (where ‘R’ is resistance, ‘A’ is the Area of cross section ,’l’ is the length)
- ρ = 1/σ ⇢ (σ is the conductivity)
Resistivity Formula
When a potential difference is applied across an object (conductor), the electrons start moving, which produces a current in the object. During this movement of electrons, they collide with other electrons too, which causes some opposition to the flow of electrons, this phenomenon of opposing the flow of electrons is known as Resistance(R). Its SI unit is the ohm(Ω)
Table of Content
- Factors affecting the resistance
- Resistivity Formula
- Derivation of resistivity
- SI unit of resistivity
- Factors affecting the resistivity
- Sample problems