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Related Concept Videos

Galvanometer01:24

Galvanometer

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Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
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Magnetic Field Of A Current Loop01:16

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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 Force On Current-Carrying Wires: Example01:22

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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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Magnetic Force Between Two Parallel Currents01:13

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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 Force On A Current-Carrying Conductor01:25

Magnetic Force On A Current-Carrying Conductor

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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.
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Eddy Currents01:25

Eddy Currents

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Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
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Related Experiment Video

Updated: Mar 1, 2026

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
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Magnetoelectric Current Sensors.

Mirza Bichurin1, Roman Petrov2, Viktor Leontiev3

  • 1Department of Design and Technology of Radioequipment, Novgorod State University, Veliky Novgorod 173003, Russia. Mirza.Bichurin@novsu.ru.

Sensors (Basel, Switzerland)
|June 3, 2017
PubMed
Summary

This study presents novel magnetoelectric (ME) current sensors utilizing the ME effect in advanced composites. Both resonant and non-resonant designs demonstrate high sensitivity and low non-linearity for accurate current sensing.

Keywords:
current sensormagnetoelectric effectmagnetoelectricitysensor design

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Physics

Background:

  • The development of novel sensor technologies is crucial for advanced measurement applications.
  • Magnetoelectric (ME) composites offer unique properties for sensor design, driven by advancements in magnetostrictive-piezoelectric materials.

Purpose of the Study:

  • To present and discuss a magnetoelectric (ME) current sensor design based on the magnetoelectric effect.
  • To evaluate both resonant and non-resonant ME current sensor configurations.
  • To theoretically calculate and experimentally characterize the performance of these ME current sensors.

Main Methods:

  • Theoretical calculations using the equivalent circuit method for ME current sensors.
  • Development and optimization of ME composite structures, specifically magnetostrictive-piezoelectric laminates.
  • Experimental characterization of non-resonant and resonant ME current sensor prototypes.

Main Results:

  • An optimal ME structure composition was identified, leading to high laminate sensitivity.
  • The non-resonant ME current sensor achieved a sensitivity of 0.34 V/A with <1% non-linearity up to 5 A.
  • The resonant ME current sensor demonstrated higher sensitivity (0.53 V/A) with <0.5% non-linearity in the same 5 A range.

Conclusions:

  • The study successfully designed and characterized ME current sensors based on the magnetoelectric effect.
  • Both resonant and non-resonant ME sensors show promising performance metrics, including high sensitivity and low non-linearity.
  • The advancements in ME composites enable practical applications of these sensors for accurate current measurements.