All Questions
10
questions
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2
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393
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The variation of induced EMF $\varepsilon$ with time $t$ in a coil if a short bar magnet is moved along its axis with a constant velocity
The variation of induced EMF $\varepsilon$ with time $t$ in a coil if a short bar magnet is moved along its
axis with a constant velocity
tack.imgur.com/hWpO5.png
can someone kindly tell the ...
- 21
0
votes
1
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82
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Why is the motion of a copper plate damped when it is allowed to oscillate between the magnetic pole-pieces? How are Eddy currents involved?
Can anyone explain this to me, in simple terms, why the motion of a copper plate is damped when it is allowed to oscillate between the magnetic pole pieces?
- 31
1
vote
2
answers
197
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Faraday's Law - When do we know when it is a motional EMF or an induced electric field?
So from what I know, Faraday's law states that when there is a change in magnetic flux, an EMF is induced.
This can be explained with motional EMF where when the magnet moves towards the conducting ...
- 67
0
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1
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358
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Does the magnetic force has anything to do with induced EMF in Faraday's law?
So according to faraday's law, when there is a change in magnetic flux, there is an induced EMF.
My understanding:
In the reference frame of the magnet, the charge is moving, hence there is a current. ...
- 67
2
votes
1
answer
130
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Misunderstanding the right hand screw rule for magnetic fields
I have learned that the right hand screw rule works for your thumb being in the direction of conventional current (positive to negative potential) but also that the right hand screw rule is used for a ...
user198159
10
votes
7
answers
3k
views
I don't understand Ampere's circuital law
Since, magnetic field is a vector quantity, two (or more) magnetic fields (when in close proximity) should influence their fields, according to the laws of vector.
And by that logic, Ampere's ...
- 119
0
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1
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49
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If two charges follow identical, curved paths, at equal velocities, and are equidistant at all times, will they exert magnetic force on each other?
Imagine one charge rotating in a circular orbit about a point, and another charge rotating about another point slightly below the first, tracing out two parallel circles on the outside of a cylinder.
...
- 533
1
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1
answer
541
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General Question about Faraday Disk and a Loop
If we have a constant magnetic field, $B$, perpendicular to a rotating metal disk (essentially Faradays's disk), with some angular frequency, $f$ . Then there will be an emf across the ends of the ...
- 11
4
votes
2
answers
2k
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Why in electrostatics is $dV=-E.dr$ but in electromagnetic induction, $EMF=+E.dS$?
In electrostatics we learned that $$dV=-E.dr$$.
I understood the derivation which was used to derive this.
Now when I have come to Electromagnetic Induction,I see that when there is a time varying ...
- 733
3
votes
3
answers
5k
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Zero current induced in a loop
Consider the following two cases,
Case 1 – A coil moving through a constant magnetic field
Case 2 – A conductor moving through a constant magnetic field
Now, in Case 1 (a coil moving through a ...
- 195