What is the Ohm's law of resistivity?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
While Ohm's Law (V = IR) describes the relationship between voltage, current, and resistance, it can be expressed in terms of resistivity as:
E = ρJ
Where:
- E = electric field (V/m)
- ρ = resistivity (Ω·m)
- J = current density (A/m²)
This is the microscopic form of Ohm's Law, showing that electric field is proportional to current density, with resistivity as the proportionality constant.
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