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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

7.9K
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...
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Magnetic Field Lines01:19

Magnetic Field Lines

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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:
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Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

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Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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Magnetic Flux01:18

Magnetic Flux

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The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
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Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

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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.
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Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
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A Magnetic Wormhole.

Jordi Prat-Camps1, Carles Navau1, Alvaro Sanchez1

  • 1Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Catalonia, Spain.

Scientific Reports
|August 21, 2015
PubMed
Summary
This summary is machine-generated.

Scientists created a magnetostatic wormhole using magnetic metamaterials. This device transfers magnetic fields between two points, making them magnetically undetectable and creating an illusion of a tunnel.

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Area of Science:

  • Physics
  • Metamaterials Science
  • Cosmology

Background:

  • Wormholes are theoretical tunnels connecting distant universe regions.
  • Previous proposals for wormholes, like Greenleaf et al.'s for electromagnetic waves, have not been realized.
  • Metamaterials offer unique properties for manipulating wave propagation.

Purpose of the Study:

  • To experimentally construct and demonstrate a magnetostatic wormhole.
  • To enable the transfer of magnetic fields through a magnetically undetectable path.
  • To explore potential applications in magnetism-based technologies.

Main Methods:

  • Utilized magnetic metamaterials and metasurfaces to construct the wormhole.
  • Designed the structure to guide magnetic fields between two distinct points.
  • Employed experimental techniques to verify magnetic field transfer and undetectability.

Main Results:

  • Successfully demonstrated a functional magnetostatic wormhole.
  • Transferred magnetic fields through a path that is magnetically undetectable.
  • Observed the magnetic field appearing as an isolated magnetic monopolar field at the destination, simulating a tunnel.

Conclusions:

  • The experimental realization of a magnetostatic wormhole is achieved.
  • This work validates the concept of cloaking magnetic fields and creating artificial wormholes.
  • Potential applications include advanced magnetic imaging and medical techniques.