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Related Concept Videos

Magnetic Damping01:17

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
The Colloidal State01:29

The Colloidal State

The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

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.
Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...

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Related Experiment Video

Updated: Jul 11, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids

Published on: September 30, 2014

Electromagnetic stabilization of weakly conducting fluids.

C F Ivory, W A Gobie, J B Beckwith

    Science (New York, N.Y.)
    |October 2, 1987
    PubMed
    Summary

    Weak magnetic fields combined with lateral currents can stabilize fluid flow in slits, challenging classical hydromagnetic theory. This interaction effectively suppresses natural convection, offering new insights into fluid dynamics.

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    Last Updated: Jul 11, 2026

    The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
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    Published on: September 30, 2014

    Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
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    Ultrasound Velocity Measurement in a Liquid Metal Electrode
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    Published on: August 5, 2015

    Area of Science:

    • Fluid dynamics
    • Magnetohydrodynamics
    • Electrolyte solutions

    Background:

    • Classical hydromagnetic theory suggests strong transverse magnetic fields stabilize fluid flow in slits.
    • Experimental evidence shows stabilization is achievable with weaker fields when a lateral current is present.

    Purpose of the Study:

    • To investigate the stabilization of dilute aqueous electrolyte flow in a slit.
    • To revise existing theories on magnetohydrodynamics in confined geometries.

    Main Methods:

    • Theoretical analysis of fluid flow under combined magnetic and electric fields.
    • Comparison of revised theory with experimental observations.

    Main Results:

    • A revised theory explains how the interaction between magnetic and electric fields eliminates natural convection.
    • Stabilization of electrolyte flow can be achieved with significantly weaker magnetic fields than previously predicted.

    Conclusions:

    • The interplay of magnetic and electric fields offers a more efficient method for stabilizing fluid flow.
    • This finding has implications for controlling convection in various scientific and engineering applications.