Formula for Ohm’s law field theory can be written in the form of equation – Basic Electrical Engineering MCQ#40

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Formula for Ohm’s law field theory can be written in the form of equation:

  1. P = VI
  2. V = IR
  3. J = σE
  4. σ = JE

Correct answer: 3. J = σE

Ohm’s law in field theory form can be mathematically expressed as follows:

J = σE

where

J = Current density at a given location in a resistive material

E = Electric Field

σ (sigma) = Conductivity (which is a material-dependent parameter)

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