Induced current with standing magnetic field

AI Thread Summary
Inducing current in a loop of wire occurs when a bar magnet is moved through it. The presence of a stronger, stationary magnetic field does not prevent current induction; only the change in magnetic flux matters. Even if the external magnetic field is stronger than that of the magnet, moving the magnet through the loop will still induce a current. The key factor is the variation in the magnetic field, not its absolute strength. Thus, current can still be induced regardless of the surrounding magnetic field's intensity.
Northprairieman
Messages
33
Reaction score
0
Hi there,

When you have a loop of wire and you move a bar magnet through it, you induce a current in the wire.

What if you were in a room where there was a magnetic field (not moving) that was stronger than the magnetic field produced by the magnet? If you moved the magnet through the loop in the presence of a magnetic field stronger than that generated by the bar magnet, would a current still be induced in the loop?
 
Physics news on Phys.org
Hi Northprairieman! :smile:

Yup! only the change matters, not the proportion. :wink:
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
View full post »

Thread 'Why measure the speed of light in one direction?'

It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
View full post »

Similar threads

I How induction works within a coil (nuances of it)
Replies
6
Views
2K
I Charge movement relative to magnetic field frame dependence/invariance
Replies
5
Views
860
I Induced electric fields and induced magnetic fields confusion
Replies
9
Views
3K
I Is This Correct Description of Magnetic Saturation?
Replies
14
Views
2K
I Faraday induction in constant B field, with non-conduction wires
Replies
2
Views
1K
B Experiment issues (electromagnetism)
Replies
42
Views
2K
I Induced Electric and Magnetic Fields Creating Each Other
Replies
3
Views
2K
I The vector math of relative motion of wire-loop & bar magnet
Replies
1
Views
2K
I Homopolar generator question: Magnetic “wake”
Replies
7
Views
3K
Induced Electrical Field (Maxwell-Faraday's Law)
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top