Electronics and Communication Engineering - Electromagnetic Field Theory - Discussion

Discussion Forum : Electromagnetic Field Theory - Section 2 (Q.No. 1)
A material has conductivity of 10-2 mho/m and a relative permittivity of 4. The frequency at which conduction current in the medium is equal to displacement current is
45 MHz
90 MHz
450 MHz
900 MHz
Answer: Option

Conduction current density J = wD

J = σE σE = ωD = 2p fD

3 comments Page 1 of 1.

RISHI NIGAM said:   10 months ago
Yes, equate sigma e=JWeE on left is conduction current also known as mini Ohm's law and on right is displacement current.

Abdul said:   4 years ago
According to me, 60mhz is correct.

Pvn said:   4 years ago
If a medium with σ = 10mS/m and ε = 3ε0 is subjected to a sinusoidal, time-varying electric field. The frequency at which conduction current equals displacement current is?

Please give me the answer.

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