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Biot-Savart Law: Problem-Solving00:59

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The magnitude and direction of a magnetic field created by a steady current can be calculated using the Biot-Savart law.
Consider a mobile phone battery bank as a source of steady current, which flows through the wire connected between the two. What is the magnitude of the magnetic field created by this current at a field point P?
To estimate the magnitude of the total magnetic field, we first consider a small current element of length dl, at a distance r from the field point. Now the following...
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Updated: Nov 28, 2025

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal
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Piezoelectric Current Generator Based on Bismuth Ferrite Nanoparticles.

Farid Orudzhev1, Shikhgasan Ramazanov1, Dinara Sobola1,2,3

  • 1Department of Inorganic Chemistry and Chemical Ecology, Dagestan State University, Makhachkala, st. M. Gadjieva 43-a, 367015 Dagestan Republic, Russia.

Sensors (Basel, Switzerland)
|December 1, 2020
PubMed
Summary

Bismuth ferrite (BiFeO3) nanoparticles were integrated into silicone to create piezoelectric generators. Higher nanoparticle concentrations resulted in increased output voltage, demonstrating potential for energy harvesting applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Piezoelectricity

Background:

  • Bismuth ferrite (BiFeO3) is a multiferroic material with potential applications in energy harvesting.
  • Developing efficient piezoelectric generators requires novel composite materials.
Keywords:
BiFeO3composite materialnanoparticlespiezoelectric generator

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