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Related Concept Videos

Magnetic Damping01:17

Magnetic Damping

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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...
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Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
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Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

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Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
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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 Fields01:27

Magnetic Fields

7.1K
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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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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Updated: Jan 16, 2026

Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes
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Jamming with magnetic composites.

Buse Aktaş1,2, Minsoo Kim3, Marc Bäckert4

  • 1Multi-Scale Robotics Laboratory, Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich, Switzerland. buse.aktas@is.mpg.de.

Nature Communications
|September 30, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel untethered jamming mechanism using magnetic interactions in soft-ferromagnetic composites. This breakthrough enables programmable, adaptive robotic structures without tethers, offering enhanced reconfigurability and scalability.

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Area of Science:

  • Robotics
  • Materials Science
  • Soft Matter Physics

Background:

  • Jamming transition offers programmable mechanical properties for adaptive structures.
  • Current jamming actuation methods (e.g., vacuum) are tethered, limiting applications.
  • Need for untethered jamming mechanisms for greater robotic system flexibility.

Purpose of the Study:

  • Introduce a novel untethered jamming mechanism using magnetic interactions.
  • Develop soft-ferromagnetic composites for programmable jamming.
  • Demonstrate and model the magneto-mechanical behavior of these composites.

Main Methods:

  • Designed soft-ferromagnetic composites with programmable magnetization.
  • Utilized external magnetic fields to control jamming.
  • Modeled the magneto-mechanical behavior of the jamming composites.

Main Results:

  • Demonstrated linear, planar, and volumetric jamming and shape-locking.
  • Successfully programmed composite magnetization for controlled jamming.
  • Established design principles for tunable jamming behavior.

Conclusions:

  • Magnetic interactions provide an effective untethered jamming mechanism.
  • Tunable jamming allows for on-the-fly control of material properties.
  • This approach advances the development of reconfigurable and scalable robotic structures.