All Questions
Tagged with electromagnetism inductance
385
questions
0
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297
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Self inductance & time constant formula
Is this a correct formula for calculating the induced EMF of a wire after the current stabilizes/ or while it stabilizes in the beginning of a DC circuit?
What is the difference between the above ...
- 1,110
2
votes
1
answer
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Why do we always consider the area of inner solenoid while calculating the mutual inductance of two coaxial solenoids?
While we know that flux linked to an area is the dot product of the area vector of the loop(and not the actual area encountering the field lines) and the magnetic field linked to it, why then do we ...
- 1,867
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1
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EMF due to self-inductance? [closed]
I'm trying to calculate the induced $-V$ in a DC circuit when current starts to flow, and reaches it's maximum value.
The inductance of the conductor is 1000nH it carries large amounts of current (...
- 1,110
2
votes
5
answers
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Is there inductance to a DC circuit?
When a DC circuit is carrying current, large amounts or small, is there induced-emf due to the inductance? Or is it only applied to AC circuits?
- 1,110
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2
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821
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Electromagnetic Inductance: Different voltmeter readings from different positions
In the setup below, the voltmeter on the right would read differently than the voltmeter on the left even though they are both connected to point D and point A.
This picture is taken from Lecture 16 ...
- 323
8
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1
answer
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Reluctance of torus shaped iron core with embedded wire loop
Imagine a circular wire loop (r = 50mm), the wire has an assumed diameter of zero, which is embedded in a torus shaped iron core with a circular cross-section of R = 10mm.
A current in that loop would ...
- 153
4
votes
2
answers
3k
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Why does the current increase in an LC circuit while the capacitor is being discharged?
From the maths governing an LC circuit (eg. $E_B=\frac{LI^2}{2}$) we can deduce, that the current through the inductor will have a maximum value, when there's no energy stored in the capacitor, or ...
- 773
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418
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Origin of induced emf
What is the origin of induced emf in a conductor which is produced by changing magnetic flux.I mean why changing magnetic flux causes the production of induced emf.
Is there some kind of energy ...
- 897
0
votes
2
answers
376
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Inductor's energy
I have some knowledge about LC circuits, like I know Maxwell's equations, the differential equations of circuit oscillator and so on. I am armed with equations to solve physical problems involving ...
- 474
0
votes
2
answers
491
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Magnetic field by a solenoid?
I am really not able to understand why is it that the current,while finding the magnetic field in the solenoid (ideal one), is not $I$ the current flowing throught the solenoid but $nI$, where $n$ is ...
- 897
1
vote
3
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1k
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Current through two inductors after a long time
I'm having trouble with visualizing the following problem, which is asking me for the final, steady current in both inductors $L_{1}$ and $L_{2}$. I was thinking that after a long time, essentially ...
- 111
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1
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Energy in a Solenoid?
Consider a circuit consisting of a battery, a resistor and a solenoid inductor. Then, the emf $\mathcal{E}$, is defined as:
$$\mathcal{E} = L\frac{di}{dt} + iR$$
Multiplying both sides by $i$ gives:
$$...
- 2,009
11
votes
3
answers
9k
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When mutual inductance is occurring between two coils, is self inductance always occurring in each individual coil?
When a coil connected to an AC generator creates an EMF in another nearby coil (mutual inductance), is self inductance simultaneously occurring in both coils?
- 545
19
votes
2
answers
999
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Are there analogs to resistance, inductance, capacitance, and memristance connecting the weak force to electromagnetism?
A question was asked over at EE.SE recently which I tried to answer, but much of my answer was speculative. I'm hoping someone here can help my ignorance.
In electronics design, there are four ...
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2
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1
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determining Induced emf/current through v x B . l
I am working on a question from my book. I am wondering how they conclude emf is negative in this case. looking at $$ \mathcal{E} = \vec{v} \times \vec{B} \cdot \vec{dl}$$ If there's some implied ...
- 225