Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.4K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
5.4K
Electric Field of a Charged Disk01:23

Electric Field of a Charged Disk

3.1K
The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
3.1K
The Electrical Double Layer01:30

The Electrical Double Layer

223
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
223
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

1.2K
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
1.2K
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

11.3K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
11.3K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

2.1K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
2.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A Real-World Study: Effect of the Third-Line Therapy of Fruquintinib or Regorafenib Therapy Versus Rechallenge Chemotherapy in Metastatic Colorectal Cancer.

Clinical oncology (Royal College of Radiologists (Great Britain))·2026
Same author

[To improve the homogeneity of primary diabetes health management: interpretation of the national guidelines for the prevention and control of diabetes in primary care (2025)].

Zhonghua nei ke za zhi·2026
Same author

Challenging Spontaneous Quantum Collapse with the XENONnT Dark Matter Detector.

Physical review letters·2026
Same author

Influence of topology on performance of pore networks in membrane filters.

Physical review. E·2026
Same author

[Association between sarcopenic obesity phenotype and mild cognitive impairment in community-dwelling old adults].

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi·2026
Same author

WIMP Dark Matter Search Using a 3.1 Tonne-Year Exposure of the XENONnT Experiment.

Physical review letters·2025

Related Experiment Video

Updated: Apr 25, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

6.4K

Electric-field variations within a nematic-liquid-crystal layer.

L J Cummings1, E Mema1, C Cai1

  • 1Department of Mathematical Sciences and Center for Applied Mathematics and Statistics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|August 15, 2014
PubMed
Summary

This study investigates the uniform electric field assumption in nematic liquid crystal (NLC) devices. Using calculus of variations, it reveals limitations of this assumption, particularly in steady-state applied fields.

More Related Videos

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

5.7K
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

8.0K

Related Experiment Videos

Last Updated: Apr 25, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

6.4K
High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

5.7K
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

8.0K

Area of Science:

  • Materials Science
  • Applied Physics
  • Electro-optics

Background:

  • Nematic liquid crystals (NLCs) are crucial for display technologies.
  • Modeling NLC behavior often assumes a uniform electric field, simplifying analysis.

Purpose of the Study:

  • To derive equations coupling electric potential and NLC director orientation.
  • To investigate the limitations of the uniform electric field assumption in NLC devices.

Main Methods:

  • Calculus of variations was employed to derive the governing equations.
  • A one-dimensional model was used to analyze steady-state electric fields in NLC layers.

Main Results:

  • The study derives coupled equations for electric potential and NLC director orientation.
  • Limitations of the uniform electric field assumption were identified for steady applied fields.

Conclusions:

  • The uniform electric field assumption in NLC devices has limitations.
  • Further investigation into unsteady electric field cases is warranted.