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Related Concept Videos

Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
Energy Associated With a Charge Distribution01:21

Energy Associated With a Charge Distribution

The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
Electric Field of Parallel Conducting Plates01:16

Electric Field of Parallel Conducting Plates

Gauss' law relates the electric flux through a closed surface to the net charge enclosed by that surface. Gauss's law can be applied to find the electric field and the charge enclosed in a region depending on its charge distribution.
Consider a cross-section of a thin, infinite conducting plate having a positive charge. For such a large thin plate, as the thickness of the plate tends to zero, the positive charges lie on the plate's two large faces. Without an external electric field, the...
Inductance: Solid Cylindrical Conductor01:24

Inductance: Solid Cylindrical Conductor

To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
Given the uniform current distribution, the magnetic field Hx and flux density Bx inside the conductor are...
Energy Bands in Solids01:01

Energy Bands in Solids

Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
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Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...

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Related Experiment Video

Updated: Jun 22, 2026

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
10:35

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

A compact structure for energy localization using a thin grounded left-handed medium slab.

Qiang Cheng, Tie Cui, Wei Bing Lu

    Optics Express
    |June 5, 2009
    PubMed
    Summary

    This study introduces a novel compact structure for energy localization using a left-handed medium (LHM) slab. Electromagnetic waves remain localized even with losses, demonstrating a practical approach to energy confinement.

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    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

    Published on: December 27, 2012

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
    10:35

    Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

    Published on: September 26, 2014

    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
    13:44

    Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

    Published on: December 27, 2012

    Area of Science:

    • Electromagnetics
    • Materials Science

    Background:

    • Left-handed materials (LHMs) offer unique electromagnetic properties.
    • Perfectly matched LHMs enable ideal energy localization but are unphysical.

    Purpose of the Study:

    • To investigate a compact structure for electromagnetic energy localization.
    • To analyze the effects of losses and retardation in LHM slabs on energy localization.

    Main Methods:

    • Theoretical analysis of electromagnetic field confinement.
    • Numerical simulations to study lossy LHM slabs.

    Main Results:

    • A grounded LHM slab confines electromagnetic fields between a source and a conducting plane.
    • Strong energy localization persists even with small losses in the LHM slab.

    Conclusions:

    • The proposed structure acts as an ideal energy localization system.
    • The LHM slab demonstrates robust energy localization capabilities, even in the presence of material losses.