What is the electric field formula for a long line?

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SUMMARY

The electric field generated by a 50 Hz overhead power line can be calculated using the formula E = I / (2 * π * ε₀ * r * v), where I represents the current, ε₀ is the permittivity of free space, r is the distance from the line, and v is the speed of light. The charge per unit length (λ) can be derived from Gauss's law, and the magnetic field (B) is expressed as B = μ₀ * I / (2 * π * r). The relationship between electric and magnetic fields is confirmed through Faraday's law, demonstrating the interconnectedness of these concepts in electromagnetic theory.

PREREQUISITES
  • Understanding of Gauss's Law
  • Familiarity with Ampère's Law
  • Knowledge of electromagnetic theory
  • Basic principles of electric and magnetic fields
NEXT STEPS
  • Research the derivation of Gauss's Law in electrostatics
  • Explore Ampère's Law and its applications in circuit analysis
  • Study the relationship between electric and magnetic fields in electromagnetic waves
  • Learn about the properties of ε₀ and μ₀ in different media
USEFUL FOR

This discussion is beneficial for electrical engineers, physics students, and anyone interested in understanding the principles of electric fields and their calculations in power transmission systems.

akle
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Homework Statement



Hi. I want to calculate electric field radiated by 50 Hz transmission line (overhead power line). for this I'm thinking about Gauss law which can help. in this case I have formula E = lambda / 2*pi*eps0*r
where lambda is charge per unit length (unit: Coloumb / m).
the problem is that if I want to calculate electric field E, how I can get value for lambda ?... is there another formula for lambda ?
 
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Finally I've found that
by Ampers law: B = mu0*I / 2*pi*r
where B is magnetic field.
after several operation i.e using Gauss law, by Faraday's law
B = mu0*eps0*E*v
after that electric field becomes E= I / 2*pi*eps0*r*v
where v is prooved to be speed of light. I've tested also this formula by taking into account units,it worked!.
very cool. I realize that these people were really genios as I'm digging into subject :)
 

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