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Questions related to Electromagnetism
Why absorption cross section is far field phenomenon, as we calculate it over desired volume of a nano-structure ?
07 July 2015 467 3 View
For example, the magnetic field B can be expressed in terms of the rotational of a vector potential, as is stablihed by Helmholtz Theorem, but this vector potential has any physical meaning like...
07 July 2015 5,814 4 View
Recently I have analysed my ferromagnetic sample through VSM and I got result like this. Can anyone interpret this VSM plot of M (moment) vs H (Field) so that it may be helpful for me.
06 June 2015 4,498 11 View
can anybody tell the clarification of variation of consecutive increasing and decreasing trend of coercive field with doping concentration. is it due to variation of grain size? or oxygen vacancies?
07 May 2015 1,462 1 View
Is there any circuit? I have a DuoLateral PSD to measure magnetostriction? Not a cantilever deflection method
07 May 2015 7,279 2 View
05 May 2015 10,014 1 View
is sample's dimension a determinant factor to exert which type of experiment? for example if the sample is a bulk material... the aim is to find out charge carrier density of the material. is...
05 May 2015 5,695 2 View
can we say these two velocities are equal, just in a degeneracy state? VD=VthF1/2(η)/F0(η) when : Vth=(2kBT/m*)1/2 Γ(3/2)/Γ(1) then : VD=(2kBT/m*)1/2 Γ(3/2)F1/2(η)/Γ(1)F0(η) is for a 2D...
05 May 2015 489 4 View
05 May 2015 1,529 2 View
It is known that the Lienard-Wiechert potentials cannot be derived from the wave equation if a radius R of the classical charge is initially assumed to be equal to zero. In original works of both...
05 May 2015 2,544 23 View
The near-field measurement was performed in the 200kHz-20MHz range and various ferrite plates were tested by placing between two loop probes.
24 April 2015 3,809 10 View
I wonder if there's any subtle meaning of the term? I find it redundant to include "density" since heat flux by definition is defined per unit area; the "density" sense is already implied. I of...
04 April 2015 395 0 View
04 April 2015 8,492 11 View
Whether the magev have superconductors which repel the guide base magnetic field or the train have electromagnets opposite to guide way to repel it from the guide way?it is obvious that the guide...
04 April 2015 7,288 3 View
As we know , when two different metals are connected electrically, the electrons in Metal A with higher fermi level will flow to metal B with lower fermi level. And finally their fermi level...
04 April 2015 8,464 5 View
03 April 2015 8,040 3 View
I have an electromagnet which is used to source pulsed magnetic fields. For the electromagnet operating with DC source, the calibration can be done with sensitive Hall probe. But for the pulsed...
18 March 2015 1,784 8 View
Is there any software (preferably MATLAB) for computing the E field resulting from a short dipole above a stratified media? I found something for a line source, but not a dipole.
03 March 2015 7,795 9 View
03 March 2015 6,641 9 View
permitivity of material is 35. so how can i find its dielectric constant/relative permitivity ?
02 February 2015 1,284 5 View
Either reflections or absorption.
01 January 2015 10,060 10 View
In transformer core,etc the eddy current path is assumed to be purely resistive in nature, but there must be some inductance due to self linkage of the eddy current generated flux with the core...
01 January 2015 5,929 4 View
I need to calculate the sensitivity from the coil using Biot Savart's law how can I calculate current using the position values of cylindrical coil and the rotation matrix the cylindrical coils...
01 January 2015 6,048 4 View
In transient analysis of electromagnets, I need to provide a sinusoidal source. I am able to give the current density at the node but unable to add frequency as input. I am using GUI for my...
01 January 2015 2,467 4 View