All Questions
Tagged with electromagnetic-induction magnetic-fields
149
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Please clear up the following confusion about Faraday's law, electromotive force, magnetic inductance, and current
As the magnet moves from the outside, the magnetic flux that is linked to the circuit is [pi_0 sin(wt)].
We have listed a series of processes related to electromotive force, self-inductance L, and ...
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What is the flux linkage or inductance or induced voltage per unit length of the hollow tube conductor surrounding the inner conductor?
What is the flux linkage or inductance or induced voltage per unit length of the hollow tube conductor surrounding the inner conductor in some section due to the current in the inner thin conductor?
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If I spin a magnet in a coil which has a length parallel to the magnet’s spin axis, is a magnetic field generated along the length of the coil?
This I feel is a bit of a complicated question, so I’ll quickly try to paint as clear a picture as I possibly can:
The magnet is spinning on an axis perpendicular to its poloidal axis (the line which ...
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Does the electric field ($E$ caused by induction) of a moving conductor in a magnetic field drop when connected to a curcuit?
We know that when a conductor moves in a homogenous magnetic field that is perpendicular to itself due to the amount of electric charge gathered on one end of the conductor( as a result of the lorentz ...
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How do I find the BH curve from the frequency-complex permeability relationship?
I come here after a lot (I mean a lot) of research about complex permeability. I have a ferrite datasheet which give the complex permeability ($\mu'$ and $\mu''$) over frequency. I don't know how to ...
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Non-parallel magnetic dipole falling throug copper tube
What happens with magnetic dipole while falling through copper cylinder?
If it's parallel to z-axis (shown on picture below with red color) we know that it stays parallel to the z-axis all the way ...
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Aluminium foil sticks to steel ring in Ring Launcher
In this video (timestamp included in link) a very strange phenomenon is demonstrated. The aluminium foil layer initially shows no reaction to the alternating magnetic field, but as soon as the thick ...
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A doubt about the topic of motional emf from Griffiths
Consider a closed rectangular loop of wire, which is moved to the right with a velocity ${\vec v}$ w.r.t a magnet that provides a static, uniform magnetic field $\vec B=-B\hat{z}$ over a region as ...
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How to reduce magnetic field between two magnetic shield sheets (silicon steel sheets)?
I put 2 parallel silicon steel sheets between magnetic field as below:
As silicon steel has much bigger permeability than air,magnetic line will go through 2 silicon steel sheets.
What I can do to ...
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Modeling the Effect of Magnetic Induction on Single Neurons
In this paper, the authors suggest a potential mechanism for magnetoreception in birds: as the Earth's magnetic field (taken to be homogeneous over sufficiently small spatial scales) passes through ...
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How to calculate retarded potential (for magnetic field calculation) for a group of current carrying loops where the magnitude of current is changing?
For constant current, the magnetic field seems to be easy to calculate because of Biot-Savart Law. For a loop having varying magnitude of current (simplifying an electromagnet), however, it seems that ...
user320191
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Do transformers return current to source when magnetic field collapse at primary coil?
When we close the circut containing an inductor and a battery, the current starts flowing, which builds magnetic field around inductor, changing magnetic field produces its own current in opposite ...
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Is Ampere's law or Fraday's Law reversible for AC currents?
In other words, if a time varying magnetic field induce a amount of voltage/current into a coiled wire, would generate the coiled wire that is loaded with the measured/calculated amount of induced ...
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Repelling ferromagnetic materials with alternating fields
Is it possible, through the induction of eddy currents, to repel a ferromagnetic material using an alternating magnetic field?
Is there a frequency where if one were to spin a strong magnet close to a ...
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How does magnetic hysteresis (ie. the $B$-$H$ curve) transform the input-output of a guitar pickup or speaker?
I understand that magnetically dependent equipment like a guitar pickup or speaker are affected by magnetic hysteresis.
Here is an article discussing the effect on speakers for example. That article ...
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