The conduction current density in a conducting medium is given by

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Question

This question was previously asked in

BPSC AE Paper 5 (Electrical) 25 Mar 2022 Official Paper

Answer 1

Explanation

Conduction current density:

It is defined as the amount of current or charges that flow through the conduction surface within a time 't'.
The current carried by conductors due to the flow of charges is called conduction current.
The conduction current follows Ohm's Law
It is given by: J_C = σE

where J_C = Conduction current density

σ = Conductivity

E = Electric field

Displacement current density:

It is defined as the rate of change of the electric displacement field with respect to time 't'.
The current due to changing electric field is called displacement current.
The displacement current does not follow Ohm's Law.
It is given by: J_D =

where J_D = Displacement current density