All Questions
Tagged with electromagnetic-induction magnetic-fields
148
questions with no upvoted or accepted answers
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How to calculate the energy transfer between working coil and working piece and dissipated energy of working piece in induction heating?
For who don't know how does induction heating work, a short description can be found here.
However, my question is about physics. Assume I have a coil inductor calculated carefully 50 uH as below:
...
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EMF induced in a loop around a solenoid - Faraday's law
Since the magnetic field outside the solenoid is negligible, it is impossible to detect current in the solenoid from outside.
Suppose I put a conducting loop of large radius, say, $10^9 $ km around ...
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Lighting an Electric Bulb with Earth's Magnetic Field
Yesterday, I was solving some problems of Electromagnetic Induction. Suddenly a thought struck my mind.
Earth has its own magnetic Field.If an aircraft of metallic body is flying in the air then ...
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Faraday's law and a moving charge
Suppose we have a moving point charge with respect to some conductor which has a shape of a closed loop (e.g. a loop of wire). From the conductor's point of view the moving charge has a magnetic field ...
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Torque on a rotating sphere in a uniform magnetic field
Consider a uniform magnetic field. We know that if we have a conductive loop rotating in this magnetic field then we get a current running through that loop due to Faraday's Law, which in turn exerts ...
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flux threading through superconducting ring
I have been confused over the wording used in this paper describing RSFQ logic circuits: http://www.mukhanov.com/uploads/LikharevSemenov-RSFQReview_IEEETAS91.pdf
From page 6: " If such a single flux ...
- 101
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Induced current created by a magnet falling in a copper tube?
One of the educational demos often shown in schools is to drop a high strength neodymium magnet down a length of copper tube. It takes a considerable time to exit the tube because as it falls it ...
user56903
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When a particle changes its spin orientation is it instantaneous?
A change of magnetic field caouses an electric field and an associated potential which is as high as the time derivative of the magnetic field.So is it possible that the change of the spin should be a ...
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Variation of Permeability with DC magnetising Field
For any Powder core, as DC magnetising field increases, the initial permeability decreases known as "permeability roll off".
For example for an MPP core-
For MPP cores the initial ...
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Do the currents of charged particles captured by Earth's magnetic field create their own magnetic fields?
Let me try to illustrate what I mean. Consider e.g. a Solar radiation storm (Solar particle event) where high-energy protons are hurled at Earth from Solar flares. I've tried to illustrate my ...
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How many electrons in a ferromagnetic material, per atom, have their spins pointing in the same direction?
Is there a list or chart somewhere that states, approximately, how many outer electrons per atom in a particular ferromagnetic material are aligned?
Are there, say, five electrons in an FeO2 magnet's ...
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Finding how to calculate the speed of a magnetic train through a coil in a simple DIY Hyperloop model
before I start, let me just say that I am terrible at physics, and this question might have some inaccurate vocabulary. I apologize for that.
I am currently working on a physics model (both ...
2
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1
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Mutual inductance - induced magnetic flux in the primary
Let there be two coils, L1 (with self inductance L1), and L2, with self inductance L2.
The first coil is connected to a sinusoidal supply, and the second one is connected to a resistor load, as shown ...
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Position of the electric field induced by a magnetic field
I've been told that a cylindrical time-varying magnetic field induces a non-conservative electric field shaped like circles centred at the axis of the cylindrical magnetic field. I suppose it's an ...
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