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If σ is the conductivity, What is the relation between the electric field E and the current density J in a conducting medium?
  • a)
    σ = J/E
  • b)
    σ = 1/JE
  • c)
    σ = E/J
  • d)
    σ = EJ
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Ifσ is the conductivity, What is the relation between the electr...
Concept:
Ohms’ law: At constant temperature, the current through a resistance is directly proportional to the potential difference across the resistance.
V = R I
Where V is the potential difference, R is resistance and I is current flowing
Current density (J): The electric current per unit area is called current density.
Conductivity (σ): The property of a conductor due to which the current flows through it is called the conductivity of that conductor.
Where ρ is resistivity = 1/σ, l is the length and A is the area of the conductor
Electric field (E) = potential difference (V)/length (l)
Analysis:
As, V = R I 
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Ifσ is the conductivity, What is the relation between the electric field E and the current density J in a conducting medium?a)σ = J/Eb)σ = 1/JEc)σ = E/Jd)σ = EJCorrect answer is option 'A'. Can you explain this answer?
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