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Tagged with electromagnetic-induction magnetic-fields
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Magnetic energy terms of system of three circuits
Say we've got a system of coplanar circuits like in the picture with same electric current flowing through them
We know that a system of circuits has magnetic energy
$$\mathcal U_{\,\mathrm m}=\dfrac{...
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Work done in a moving conducting bar and in a Faraday disk
I deeply apologize for my ignorance, but I am asking this since I still can't seem to grasp what my teachers relayed to me a few days ago about two exercises that I solved in an intrinsically wrong ...
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How does any changing magnetic field induce voltage?
Hopefully the title puts in well enough;
a charged particle moving in a magnetic field experiences the Lorentz-Force. If this occurs in a wire and part of the circuit is outside the B-Field then a ...
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The direction of the induced electric field
Recently I got stuck witht the following problem.
Imagine we have uniform a magnetic field which induction points upwards. The fields strength is steadily decreasing. If we put an iron coil ...
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What is the reletive permeability of structual steel?
Help, i need to know what the reletive permeability is of a few materials (listed below) but i can not find the data on the internet. Does annybody know the data or where i can find it?
-s235jr
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How do Relativity explains electromagnetic induction in the case of changing $\bf{B}$ with both loop and magnet at rest?
Here is how Griffiths lists the experimental evidences of electromagnetic induction.
Case 1 can be explained with Lorentz Force. I understood how Special Relativity relates case 2 to case 1, ...
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What is the difference between paramagnetic and ferromagnetic?
What is the difference between paramagnetism and ferromagnetism?
Before answering, I want to note my difference between the rest of the similar questions on this website: from what I think I know, ...
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Emf induction in a conducting coil placed in a variable magnetic field
Consider a conducting coil placed in a variable magnetic field. By the laws of nature, an emf will be induced in the coil. Between which two points is the emf induced in the coil?
If we consider it to ...
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What area should be chosen for finding EMF induced when only magnetic field $B$ is changing?
Suppose i have a region with uniform magnetic field which is changing with time.
For finding EMF induced in a conductor, we use $\frac{d\phi}{dt}$, where $\phi=B.A$ (as $B$ is uniform).
$$\implies EMF ...
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Is the induced electric field generated due to the separation of charges in a moving wire in a magnetic field non-conservative?
As the title suggests, whenever there is a moving wire in a magnetic field of constant magnitude, an induced voltage is produced. Now, due to the separation of charges, which is a result of the ...
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How is the magnetic flux density inside a current tube affected by an inner wire?
Background to problem
Conventional wisdom informs that the magnetic flux density inside a tube carrying current is zero everywhere. Pictorially this is represented by this finite element analysis (...
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Straight wire cutting magnetic flux - Faraday's law
For a straight wire moving perpendicular to a uniform magnetic field in velocity v,
$$ε=\dfrac{\Delta \Phi}{\Delta t}=\dfrac{BLv \Delta t}{\Delta t}$$
So the induced e.m.f in the conductor as it moves ...
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Ring Magnet with a wire in the middle
I have a very specific question concerning a system with a magnet and a wire.
Consider a ring magnet with a magnetic field directed right through its center. In the center of the magnet is a wire, ...
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What happens if I have a square conducting wire being permeated by a magnetic field and the field suddenly disappears?
Suppose there is a square conducting wire in a magnetic field. The two vertical branches will have the same emf, and the two horizontal branches will have 0 emf, resulting in a net emf of zero and ...
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Is this a correct way of finding magnetic field of a magnet created with Wasilewski's method?
$\quad$ Wasilewski's method (Or the method that could be seen in Dr Stone episode 9) consists of piece of iron being struck by a lightning, which then magnetises it. Let's say, we have a cylindrical ...
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