Question

Electric field and current density have relation

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

Answer 1

Answer: (A)

$E \propto J$

Answer 2

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