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Magnetic Force On A Current-Carrying Conductor

Magnetic Force On A Current-Carrying Conductor

Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a conductor carrying a current creates a magnetic field around it.
Consider a compass placed near a current-carrying wire. The wire experiences a force that aligns the needle of the compass tangentially around the wire. Thus, the current-carrying wire produces concentric circular loops of magnetic field. The magnetic field generated by a wire can be...

Magnetic Force On Current-Carrying Wires: Example

Magnetic Force On Current-Carrying Wires: Example

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.

Force On A Current Loop In A Magnetic Field

Force On A Current Loop In A Magnetic Field

Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...

Torque On A Current Loop In A Magnetic Field

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...

Magnetic Force Between Two Parallel Currents

Magnetic Force Between Two Parallel Currents

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.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and the vector product of the length vector along the current element and the field due to the first conductor. According to the...

Magnetic Field Of A Current Loop

Magnetic Field Of A Current Loop

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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Related Experiment Video

Updated: Jun 22, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

Dynamic Control of the Vortex Pinning Potential in a Superconductor Using Current Injection through Nanoscale

Yoav Kalcheim¹, Eran Katzir¹, Felix Zeides¹

¹Racah Institute of Physics and the Center for Nanoscience and Nanothechnology and ‡Applied Physics Department and the Center for Nanoscience and Nanothechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel.

|April 14, 2017

Summary

Researchers demonstrate dynamic control over nanoscale vortex potential in superconductors using patterned current injection. This method creates a tunable artificial vortex potential, enabling unique vortex channeling effects for advanced applications.

Keywords:

Superconducting vortices artificial vortex pinning nonequilibrium quasiparticle distribution superconductivity vortex manipulation

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Area of Science:

Condensed matter physics
Nanotechnology
Superconductivity

Background:

Controlling vortex potential at the nanoscale is crucial for fundamental and technological superconductor applications.
Existing methods like magnetic nanostructures offer static pinning centers, lacking dynamic control.
Scanning probe methods provide dynamic control but are difficult to scale.

Purpose of the Study:

To develop a method for dynamic control over artificial vortex potential in superconductors.
To investigate the effects of patterned current injection on vortex behavior.
To achieve tunable vortex channeling at the nanoscale.

Main Methods:

Utilizing controllable nanopatterned current injection.
Locally driving the superconductor out of equilibrium.
Tuning the artificial vortex potential via injected current magnitude.

Main Results:

Successful creation of a tunable artificial vortex potential.
Demonstration of a unique vortex channeling effect.
Achieved dynamic control over vortex pinning at the nanoscale.

Conclusions:

Nanopatterned current injection offers a scalable method for dynamic control of vortex potential.
This technique enables precise manipulation of vortices for potential technological advancements.
The demonstrated vortex channeling effect opens new avenues in superconducting device research.