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Related Concept Videos

Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

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In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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Ferromagnetism01:31

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Magnetic Field Due To A Thin Straight Wire01:28

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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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Magnetic Field Due to Two Straight Wires01:18

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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 Force01:18

Magnetic Force

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In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
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Magnetic Fields01:27

Magnetic Fields

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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.
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Updated: Aug 2, 2025

Fabricating Metamaterials Using the Fiber Drawing Method
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Soft Multimaterial Magnetic Fibers and Textiles.

Hritwick Banerjee1, Andreas Leber1, Stella Laperrousaz1

  • 1Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.

Advanced Materials (Deerfield Beach, Fla.)
|April 20, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed long, flexible magnetic fibers using thermal drawing for soft robotics and smart textiles. These ultrastretchable fibers can be magnetically controlled and integrated into washable textiles for advanced applications.

Keywords:
magnetic polymer compositesmultimaterial fiberssmart textilessoft actuatorssoft materials

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Area of Science:

  • Materials Science
  • Soft Robotics
  • Textile Engineering

Background:

  • Magnetically responsive soft materials are key for advanced applications like soft robotics and smart textiles.
  • Fabricating highly integrated magnetic fibers with extreme aspect ratios for steerable devices and textiles is challenging.

Purpose of the Study:

  • To develop a method for creating long, soft, ultrastretchable, and resilient magnetic fibers.
  • To demonstrate the potential of these fibers in various applications, including medical devices and functional textiles.

Main Methods:

  • Utilized multimaterial thermal drawing as a fabrication platform.
  • Engineered nanocomposite domains with ferromagnetic microparticles in a soft elastomeric matrix.
  • Optimized filler content for a balance between magnetization and mechanical stiffness.

Main Results:

  • Fabricated magnetic fibers with diameters as low as 300 µm and aspect ratios of 10^5.
  • Demonstrated fibers withstanding >1000% strain, magnetically actuated, and capable of lifting 370 times their weight.
  • Integrated microfluidic channels and wove fibers into conventional textiles, showing washability and shape-folding capabilities.

Conclusions:

  • Multimaterial thermal drawing enables the creation of advanced magnetic fibers for next-generation soft systems.
  • These magnetic fibers offer significant potential for innovation in medical textiles and soft magnetic applications.