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Related Concept Videos

Magnetism01:30

Magnetism

9.9K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
9.9K
Magnetic Fields01:27

Magnetic Fields

7.9K
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.
A magnetic field is defined by the force that a charged particle experiences...
7.9K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

885
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...
885
Eddy Currents01:25

Eddy Currents

3.0K
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.
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
3.0K
Diamagnetism01:26

Diamagnetism

3.5K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.5K
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

10.3K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
10.3K

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Related Experiment Video

Updated: Apr 1, 2026

Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
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Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy

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XXIst century magnetotherapy.

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Electromagnetic Biology and Medicine
|October 8, 2015
PubMed
Summary

This study reviews therapeutic uses of magnetic and electromagnetic fields (EMF) for diverse medical conditions, including pain and endocrine disorders. It covers EMF parameters, dosimetry, protocols, safety, and mechanisms of action for these innovative treatments.

Area of Science:

  • Biophysics
  • Medical Physics
  • Electromagnetic Therapy

Background:

  • Magnetic and electromagnetic fields (EMF) show potential for treating various medical conditions.
  • Current applications range from pain management to musculoskeletal trauma and endocrine disorders.

Purpose of the Study:

  • To review the state-of-the-art therapeutic applications of EMF in medicine.
  • To discuss challenges and considerations in EMF therapy, including physical parameters, dosimetry, and safety.

Main Methods:

  • Literature review of current research on EMF therapeutic applications.
  • Analysis of challenges in biophysical dosimetry and clinical protocol development.
  • Examination of safety considerations for device operators.
Keywords:
Clinical applicationelectromagnetic fieldsmagnetotherapy

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In Vitro and In Vivo Delivery of Magnetic Nanoparticle Hyperthermia Using a Custom-Built Delivery System
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Using Magnetometry to Monitor Cellular Incorporation and Subsequent Biodegradation of Chemically Synthetized Iron Oxide Nanoparticles
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Main Results:

  • EMF therapy is applicable to a wide spectrum of medical issues.
  • Key challenges include defining optimal physical parameters and accurate biophysical dosimetry.
  • Clinical protocols and operator safety require careful consideration.

Conclusions:

  • EMF represents a promising therapeutic modality with broad medical applications.
  • Further research is needed to optimize EMF parameters, dosimetry, and clinical protocols.
  • Ensuring safety is paramount for the widespread adoption of EMF therapy.