Need help with electromagnetics

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SUMMARY

The discussion centers on calculating the capacitance per unit length of a coaxial transmission line with two dielectric layers. The inner radius is denoted as r(i) and the outer radius as r(o), with dielectric constants Epsilon(1) and Epsilon(2) for the respective layers. The user seeks guidance on determining charge (Q) and voltage (V) to compute capacitance using the formula C = Q/V. Key equations and integral methods are necessary for solving this problem.

PREREQUISITES
  • Understanding of coaxial transmission line theory
  • Familiarity with dielectric materials and their properties
  • Knowledge of capacitance calculations in electromagnetics
  • Proficiency in integral calculus for solving electromagnetic equations
NEXT STEPS
  • Study the derivation of capacitance for coaxial cables with multiple dielectrics
  • Learn about the application of Gauss's Law in electromagnetics
  • Explore integral calculus techniques for electromagnetic field calculations
  • Review resources on coaxial transmission line design and analysis
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Electrical engineers, physics students, and professionals working with transmission lines and electromagnetic theory will benefit from this discussion.

vptran84
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Hi,

once again i need help with electromagnetics. if anyone can help, it would be greatly appreciated.

here is the problem:

The radius of the core and the inner radius of the outer conductor of a very long coaxial transmission line are r(i) and r(o), respectively. The space between the conductors is filled with two coaxial layers of dielectrics. The dielectric constants of the dielectrics are Epsilon(1) for r(i)<r<b. and Epsilon(2) for b<r<r(o). Determine it's capacitance per unit length.

From what i already know, the Capacitance=Q/V. So in order to find Q and V, we have to find the integral of Q and V? CAn someone point me to the right direction? I'm so lost in electromagnetics, i don't even know which equations to use.
 
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