The current flowing through a 300-m-long conducting wire of uniform cross section has a density of 3×〖10〗^5 A/m2. Find the voltage drop across the length of wire if the wire material has conductivity of 2×〖10〗^7 (S/m)
Category: electromagnetic field theory
Numerical of Fawwaz T. Ulaby
A 25-m long copper wire has a circular cross section with radius r=2cm. Given that the conductivity of copper is 5.8×〖10〗^7 (S/m), determine (a) the resistance R of the wire and (b) the power dissipated in the wire if the Read More …
Why Circuit Theory Fails at High Frequency?
Circuit Theory at High Frequency Why Circuit Theory Fails at High Frequency? Circuit theory, which is based on the principles of Kirchhoff’s laws and Ohm’s law, is a powerful and widely used tool for analysing electrical circuits at low to Read More …
Design Optimization of a Tunable Coplanar Patch Antenna

Tunable Coplanar Patch Antenna In this article, we have discussed about Design Optimization of a Tunable Coplanar Patch Antenna. Due to the small size and simplicity of integration into contemporary wireless communication systems, coplanar patch antennas have grown significantly in Read More …
The Electric Field of Direct Current (DC) and Alternating Current (AC)

The Electric Field of a Direct Current (DC) The Electric Field of Direct Current (DC) and Alternating Current (AC). If a constant voltage is connected across a length of wire, the voltage will cause a proportional current governed by Ohm’s Read More …
Imaging and the Imaging Resolution
Spherical Coordinate Systems Explanation
What is the spherical coordinate system? What is the spherical coordinate system? A point P in space in spherical coordinates is uniquely represented in terms of r,θ,φ, where r is the radial distance from O to P, θ in the Read More …
what is the cylindrical coordinate system?
what is the cylindrical coordinate system? what is the cylindrical coordinate system? This system helps to analyze the geometry of a coaxial cable and we can analyze its electric field intensity or electric field more easily using them. Three coordinates Read More …
What is an Electric Dipole?

Introduction to Electric Dipole What is an Electric Dipole? In order to understand the basis of behavior of dielectric materials in electric field, dipole fields are used. Dipole fields are also helpful for understanding the concept of imaging. When the Read More …