State expression for current density in terms of conductivity.
State expression for current density in terms of conductivity.
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Current density, \(\overset\rightarrow{j}=\frac{1}{ρ}\,\overset\rightarrow{E}\) = σ \(\overset\rightarrow{E}\)
where, ρ = resistivity of the material
E = electric field intensity
σ = conductivity of the material
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