• دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است

What are magnetic fields? (article) | Khan Academy

A magnetic field is a picture that we use as a tool to describe how the magnetic force is distributed in the space around and within something magnetic. [Explain] Most of us have some familiarity with everyday magnetic objects …

به خواندن ادامه دهید

Earth's magnetic field protects life on Earth from radiation, but it

The Earth's magnetic field deflects particles emitted by the Sun. Mark Garlick/Science Photo Library via Getty Images. Earth's magnetic field protects life on Earth from radiation, but it can ...

به خواندن ادامه دهید

21.4: Motion of a Charged Particle in a Magnetic Field

Magnetic forces can cause charged particles to move in circular or spiral paths. Particle accelerators keep protons following circular paths with magnetic force. Cosmic rays will follow spiral paths when encountering the magnetic field of astrophysical objects or planets (one example being Earth's magnetic field).

به خواندن ادامه دهید

11.4: Motion of a Charged Particle in a Magnetic Field

This is the direction of the applied magnetic field. The period of the charged particle going around a circle is calculated by using the given mass, charge, and magnetic field in the problem. This works out to be [Math Processing Error] (11.4.8) T = 2 π m q B = 2 π ( 6.64 × 10 − 27 k g) ( 3.2 × 10 − 19 C) ( 0.050 T) = 2.6 × 10 − 6 s.

به خواندن ادامه دهید

Magnetic particles for integrated nucleic acid purification

Magnetic particles Nucleic acid Integrated detection Immiscible interface Abbreviations POCT point-of-care testing PCR polymerase chain reaction qPCR quantitative PCR ICP-AES inductively coupled plasma atomic emission spectroscopy TEM transmission electron microscopy

به خواندن ادامه دهید

Magnetic force | Definition, Formula, Examples, & Facts

magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron. Electric forces exist among stationary electric charges; both electric and magnetic forces exist among …

به خواندن ادامه دهید

Force between magnets

Magnets exert forces and torques on each other through the interaction of their magnetic fields.The forces of attraction and repulsion are a result of these interactions. The magnetic field of each magnet is due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that …

به خواندن ادامه دهید

Magnetic field | Definition & Facts | Britannica

Magnetic fields force moving electrically charged particles in a circular or helical path. This force—exerted on electric currents in wires in a magnetic field—underlies the operation of electric motors. (For more information about magnetic fields, see magnetism. Discover how wireless electricity works and its usages

به خواندن ادامه دهید

Magnetic Particle Inspection

Magnetic particle inspection is a simple NDI method used to detect cracks at the surface of ferromagnetic materials such as steels and nickel-based alloys. The inspection process begins with the magnetisation of the component. The surface is then coated with small magnetic particles, which is usually a dry or wet suspension of iron filings.

به خواندن ادامه دهید

Magnetic Properties of Magnetic Particles | Bangs Laboratories, Inc.

Magnetic Properties of Magnetic Particles. Bangs Laboratories offers multiple lines of superparamagnetic microparticles with different chemical and physical properties to address a wide range of applications in the life sciences, e.g. as solid supports for cell separations, biomolecule isolations and purifications, immunoassays, and suspension ...

به خواندن ادامه دهید

Magnetic nanoparticles

Types of magnetic nanoparticles Oxides: ferrites. Ferrite nanoparticles or iron oxide nanoparticles ( iron oxides in crystal structure of maghemite or... Ferrites with a shell. TEM image of a maghemite magnetic nanoparticle cluster with silica shell. ... The surface of a... Metallic. Metallic ...

به خواندن ادامه دهید

Magnetic field

Magnetic nanoparticles – extremely small magnetic particles that are tens of atoms wide; Magnetic reconnection – an effect that causes solar flares and auroras; Magnetic scalar potential; SI electromagnetism units – common units used in electromagnetism

به خواندن ادامه دهید

E709 Standard Guide for Magnetic Particle Testing

1.1 This guide 2 covers techniques for both dry and wet magnetic particle testing, a nondestructive method for detecting cracks and other discontinuities at or near the surface in ferromagnetic materials. Magnetic particle testing may be applied to raw material, semifinished material (billets, blooms, castings, and forgings), finished material ...

به خواندن ادامه دهید

Magnetic Particle

Magnetic particles are an important class of micro-/nanomaterials that display magnetic properties when subjected to external magnetic fields. This interesting feature has resulted in their widespread use in research and clinical diagnostics.

به خواندن ادامه دهید

Magnetic Particles for Advanced Molecular Diagnosis

The application of magnetic particles in molecular diagnosis tools has led to tremendous breakthroughs in terms of specificity, sensitivity, and discrimination in bioassays.

به خواندن ادامه دهید

Magnetic Particle

Magnetic Particle Colloidal magnetic metal oxide nanocrystals and their applications. MPI is a relatively new radiation-free tomographic... Superparamagnetic iron oxide nanoparticles (SPIONs) as therapeutic and diagnostic agents. Nisha Lamichhane, ... ... Magnetic nanoparticles. Amrendra K. Tiwari, ...

به خواندن ادامه دهید

Magnetic nanoparticles in biomedical applications: A review

The first part gives a comprehensive overview of magnetic nanoparticles in the treatment of chronic diseases and drug targeting. The second part includes the role of magnetic nanoparticles in electrochemical, optical-based immunoassays.

به خواندن ادامه دهید

What Is Magnetism? | Magnetic Fields & Magnetic Force

Magnets, or the magnetic fields created by moving electric charges, can attract or repel other magnets, and change the motion of other charged particles. Magnetism is a force of nature produced by ...

به خواندن ادامه دهید

Magnetic Particles: Their Applications from Sample Preparations …

The developed magnetic iron oxide particles have been significantly utilized for diagnostic applications, such as sample preparations and biosensing platforms, leading to the selectivity and sensitivity against target molecules and …

به خواندن ادامه دهید

Magnetic particle inspection

Magnetic particle Inspection ( MPI) is a nondestructive testing process where a magnetic field is used for detecting surface, and shallow subsurface, discontinuities in ferromagnetic materials. Examples of ferromagnetic materials include iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part.

به خواندن ادامه دهید