All Questions
38
questions
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1
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96
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Forms of energy in a closed circuit with a coil
I am a bit confused. When i move a magnet through a coil thats in a closed circuit, what does my kinetic energy convert to?
I assume I will create a magnetic field, and that magnetic field will create ...
- 15
0
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0
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84
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How to simulate magnetic field of a toroidal solenoid?
I am trying to simulate the magnetic flux inside and outside of a classic toroidal solenoid. The simulation must be able to simulate a toroidal solenoid with several densely wound layers of copper ...
- 3
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1
answer
26
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Does electromagnetic induction moves the body or it just makes an induced current?
If I approched a magnet to a coil does it moves it by the effect of induced electric current so it repells away from the magnet or it just induces the current in the coil without the coil making a ...
1
vote
0
answers
97
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How to find inductance using $\phi=L I$ for distributed current case? [closed]
A current flows via two long coaxial cables.
Inductance is defined as
$\phi=L I$ but in this case where is the loop through which I should find the flux?
Is it even reasonable to define inductance ...
- 1,270
0
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0
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122
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Self-inductance, back EMF and energy stored in magnetic fields
First let's talk about self inductance. A current-carrying loop produces a magnetic field which in turn produces a flux through the loop. If this current is increased, the flux changes as the magnetic ...
- 453
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1
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119
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What equation should I use to calculate inductance of a wire coil?
I've been working on a project recently which requires me to build an inductor, however in my research I found many different equations (with a range of variables used and giving very different ...
2
votes
1
answer
290
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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 ...
- 21
0
votes
1
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75
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Energy stored in an Inductor is used to move electrons
I was reading about the energy stored in an Inductor and first of all I had the question that is this actually stored? The inductor produces a magnetic field which exerts a force on electrons. Isn't ...
1
vote
3
answers
821
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Why does the current through an Inductor changes when the Inductor doesn't like the change of flux through it?
Consider the example shown above. Here we have connected an active inductor, in which the initial current is "I", to a resistance, with the help of a switch and close the switch at t=0. We ...
- 2,517
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votes
1
answer
108
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Understanding the physics of inductors
If an inductor "stores energy in a magnetic field", what does that mean exactly? It sounds like there's an invisible force field emanating from the coil or orbiting around the wire. As if electrons ...
- 179
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votes
1
answer
329
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Why exactly does a current flow in an inductor oppose itself
So, I've understood that a current flow in an inductor produces
1) The original magnetic field along the direction of the curl E of the inductor.
2)Change in the magnetic field along the opposite ...
- 581
3
votes
0
answers
231
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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
1
vote
1
answer
330
views
Which method of calculating mutual inductance to use?
I am planning to make a wireless charging device for a school project using coupled induction. However, I have found a few different ways of calculating mutual inductance for coupled solenoids and ...
- 13
0
votes
1
answer
57
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Interaction between a current-driven coil and a second passive coil in the same space
Good evening,I have some doubts about mutual inductance. I hope that somebody will be willing to reply to my questions.
We have a coil L1 traversed by a current I1. If the current is stationary, L1 ...
1
vote
2
answers
621
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Paramagnetic material in a coil
If we hold the voltage constant, will (and how) the current through a coil change if we put a paramagnetic material in the coil ?
