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Videos de Conceptos Relacionados

Magnetic Fields01:27

Magnetic Fields

7.3K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
7.3K
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

5.8K
A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
5.8K
Magnetic Field Lines01:19

Magnetic Field Lines

5.8K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
5.8K
Energy In A Magnetic Field01:24

Energy In A Magnetic Field

2.7K
If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
2.7K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

6.3K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
6.3K
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

11.6K
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...
11.6K

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Video Experimental Relacionado

Updated: Jan 31, 2026

Antibody Labeling with Fluorescent Dyes Using Magnetic Protein A and Protein G Beads
06:48

Antibody Labeling with Fluorescent Dyes Using Magnetic Protein A and Protein G Beads

Published on: September 15, 2016

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Los campos magnéticos causan que las proteínas fluorescentes se atenúen.

Robert F Service

    Science (New York, N.Y.)
    |January 29, 2026
    PubMed
    Resumen

    Este estudio introduce un efecto novedoso que permite el diagnóstico similar a la resonancia magnética y la administración de medicamentos controlada a distancia. Este avance ofrece potencial para imágenes médicas avanzadas y terapias dirigidas.

    Área de la Ciencia:

    • Ingeniería Biomédica Ingeniería Biomédica.
    • Nanotecnología La nanotecnología es la nanotecnología.
    • Imágenes médicas de imágenes médicas.

    Sus antecedentes:

    • Los métodos de diagnóstico actuales tienen limitaciones en cuanto a resolución y especificidad.
    • Los sistemas de administración remota de medicamentos requieren mecanismos de activación precisos.

    Objetivo del estudio:

    • Explorar un nuevo efecto físico para aplicaciones médicas avanzadas.
    • Desarrollar una plataforma para diagnósticos compatibles con resonancia magnética y terapias dirigidas.

    Principales métodos:

    • Utilizando principios avanzados de resonancia magnética.
    • Desarrollar nuevos nanomateriales para la entrega dirigida.
    • Implementación de protocolos de activación remota.

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    Antibody Labeling with Fluorescent Dyes Using Magnetic Protein A and Protein G Beads
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    Principales resultados:

    • Demostró capacidades de imágenes similares a la resonancia magnética con contraste mejorado.
    • Se logró la liberación conmutable y controlada a distancia de agentes terapéuticos.
    • Valida la eficacia del sistema en modelos preclínicos.

    Conclusiones:

    • El efecto descubierto es muy prometedor para el diagnóstico no invasivo.
    • Esta tecnología permite una administración de fármacos precisa y controlada externamente.
    • Las aplicaciones futuras incluyen medicina personalizada y técnicas avanzadas de imagen.