Electromagnetism

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Questions related to Electromagnetism

Will an electromagnet core be as efficient if it is made of several pieces?

If you had a design for an electromagnet core that required it to be assembled out of several parts would it still produce as strong a magnetic field as the same core but made out of a single...

18 January 2021 6,262 3 View

Iron powder core made not improving magnetic field strength ?

I made an iron powder core of the following specifications: Radius : 65mm Length : 10mm Mass of iron used : 10% mass fraction (20g) Total mass : 200g Binder : Slow cure epoxy I noticed that...

28 September 2020 2,592 4 View

Modelling an electromagnet and a piece of materiel?

if there is somebody who can help me with modeling an electromagnet 12V Dc and a piece of material placed on the electromagnet core to study the effect of current flux on the mechanical properties...

11 September 2020 2,384 2 View

What are the best references for experiences on the implementation of simulation software in undergraduate teaching?

I am looking for benchmarks in educational studies that investigated the benefits, obstacles and disadvantages regarding the use of simulation software to support teaching at undergraduate level....

25 August 2020 7,343 9 View

Which is the best material for an electromagnet core?

I need to build a continuous electromagnet, B=1-2 T, narrow hysteresis loop, good linearity (to have the flux density easily adjustable). Application - MeV electron beam deflection. I'll be...

28 April 2020 4,791 2 View

What are the experimental methods to measure magnetic field, B of a novel electromagnet?

I am following the below method so far & need guidance to further modify it: 1) Making a specimen 2) Making an Electromagnet using prepared specimen 3) Using DC & AC Source to find BH-...

07 April 2020 4,193 5 View

How to calculate the current (in amperes) flowing through a volume, when a current density is applied on the volume ?

Hello, I would like to know how to deduce the amount of current flowing through a solid volume , when current is applied in the form of current density 'J' (A/m2). Example: As shown in the image...

22 October 2019 8,678 6 View

Literature resources in computational electromagnetism based on Maxwell's equations and application of FEM for high frequency applications?

Hello everyone, I am searching for references in numerical modelling of fully-coupled electromagnetism with FEM for high frequency applications? I am particularly focussed on induction heating of...

10 October 2019 7,018 3 View

How to calculate the current (in amperes) flowing through a volume, when a current density is applied on the volume ?

Hello, I would like to know how to deduce the amount of current flowing through a solid volume , when current is applied in the form of current density 'J' (A/m2). Example: As shown in the image...

10 October 2019 5,939 7 View

Magnetic monopole pairs generated by photon/photon collisions?

The transformation of two "colliding" photons into a pair of particle / anti-particle was experimentally observed already. But the observed particles are always electrically charged. 1. If such a...

31 July 2019 1,957 18 View

Magnetic monopole pairs generated by photon/photon collisions?

The transformation of two "colliding" photons into a pair of particle / anti-particle was experimentally observed already. But the observed particles are always electrically charged. 1. If such a...

07 July 2019 9,151 19 View

Difference between Magnetic Field Intensity and Surface Current Density?

Both of their units are A/m, yet both seem to be different! What is the difference?

06 June 2019 3,042 7 View

What role does electromagnetism play in modern power electronics? Such as magnetic components, device package, PCB layout, EMI/EMC, or any coupling?

Waiting for different good answers

06 June 2019 5,265 3 View

Fluent MHD using .mag magnetic field?

Hi, everyone! I want to use fluent's MHD module to simulate, using electromagnet to generate a rotating magnetic field, which can induce current in liquid metal and make liquid metal flow. How can...

05 May 2019 4,446 1 View

What is the analogue of a dielectric in magnetism?

Capacitors and dielectrics pertain electric phenomena, one could say that inductors can be considered analogues of capacitors in the magnetic case. Is there a dielectric analogue in magnetism?...

03 March 2019 8,726 5 View

Do Maxwell's equations, and classical electrodynamics in general, work at subatomic level?

What I know is that the classical picture of atomic structure can't predict its stability (also the discrete spectral lines) which led to inventing quantum mechanics that predicts stationary...

03 March 2019 8,652 3 View

Difficulties in precision low voltage measurement using Nanovoltmeter in presence of time varying magnetic field?

I have recently tried to measure precision low voltage measurement using Keithley nanovoltmeter with time varying magnetic field. But always getting false voltage varying with this increasing...

02 February 2019 622 3 View

What is the magnetic moment of a partially ionized particle?

I want to focalize a partially ionized boron then I have to calculate the trajectory. I know its rotation speed and also the number of charges (1 or 2), I can calculate the electrostatic force but...

11 November 2018 7,956 0 View

How to measure the eddy currents?

An eddy current is a well known reaction in electromagnetism. They exist in the ferromagnetic core of various static and moving electromagnetic induction based machines, for example, transformers...

11 November 2018 10,065 4 View

What is the relation between material and spatial polarization in electroelasticity?

Consider a electroelastic body in the reference and current configuration, whose coordinate system are coincident. The electric displacement DI is defined in the sense that the electric charge...

10 October 2018 980 0 View

IS abaqus able to simulate the electromagnetism induction phenomenon?

Hello everyone! I want to know may i use the ABAQUS to simulate the electromagnetism induction phenomenon? For instance, i wanna simulate the magnetic rod passes through the coil and...

08 August 2018 483 0 View

Any suggestions for electromagnets with a height of only 30 mm and generates perpendicular magnetic fields of ~2k Oe?

I am looking for a small electromagnet with a height of only 32 mm with cooling system and produce an out-of-plane magnetic field of about 2k Oe. Does any one know any brand which produces the...

08 August 2018 3,114 1 View

Why is special and general relativity still denied today?

The Einstein Phenomenon and "fake news" Without special relativity, there is no electromagnetism, no magnetism. No light, radio, TV, laser, ICs, Internet, MRI. Maxwell's equations in...

07 July 2018 2,811 91 View

Electromagnetic control on microscale?

Does anyone has an idea on how to establish an electromagbetic control of a flexible and thin polymer (5-10 um thick)? I think shrinking an electromagnet down to this size might not work. Is...

27 June 2018 3,321 2 View

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