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In a material for which conductivity σ = 5 Siemen/m and ∈r = 1, the electric field intensity is E = 250 sin 1010 t V/m. What is the frequency at which the displacement and conduction current densities will be eaual?
  • a)
    60 GHz
  • b)
    90 MHz
  • c)
    60 MHz
  • d)
    90 GHz
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In a material for which conductivity σ = 5 Siemen/m and ∈r ...

= Conduction current density
and 
= Displacement current density


or  

or 
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Most Upvoted Answer
In a material for which conductivity σ = 5 Siemen/m and ∈r ...
Is important, the conductivity is a measure of how easily electric current flows through the material. Materials with high conductivity are good conductors of electricity, while materials with low conductivity are poor conductors. Some examples of materials with high conductivity include metals like copper and aluminum, while materials with low conductivity include rubber and glass.

Conductivity is an important property in many applications, including electrical wiring, electronics, and power transmission. In electrical wiring, high conductivity materials are used to minimize energy loss due to resistance. In electronics, high conductivity materials are used to ensure reliable transmission of signals. And in power transmission, high conductivity materials are used to minimize energy loss during long distance transportation.

Conductivity is typically measured in units of siemens per meter (S/m) or ohms per meter (Ω/m). The conductivity of a material can be affected by factors such as temperature, pressure, and impurities. In some cases, materials can be engineered to have specific conductivity properties for particular applications.
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In a material for which conductivity σ = 5 Siemen/m and ∈r = 1, the electric field intensity is E = 250 sin 1010 t V/m. What is the frequency at which the displacement and conduction current densities will be eaual?a)60 GHzb)90 MHzc)60 MHzd)90 GHzCorrect answer is option 'D'. Can you explain this answer?
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