Question

Electric field (E) and current density (J) have relation

• A. $ E\propto {{J}^{-1}} $
• B. $ E\propto J $
• C. $ E\propto \frac{1}{{{J}^{2}}} $
• D. $ {{E}^{2}}\propto \frac{1}{J} $

Answer 1

Answer: (B)

Current density relates with electric field as $ \vec{J}=\sigma \vec{E}=\frac{{\vec{E}}}{\rho }; $ where $ \sigma = $ conductivity and $ \rho = $ resistivity or specific resistance of substance.