Direction of the induced current

AI Thread Summary
The direction of the induced current in a rotating wire within a constant magnetic field depends on the orientation of the area vector relative to the magnetic field. If the area vector is parallel to the magnetic field, the induced current flows in one direction, while if it is anti-parallel, the current flows in the opposite direction. Lenz's law is relevant here, as it states that the induced current will flow in a direction that opposes the change in magnetic flux. Understanding the relationship between the area vector and the magnetic field is crucial for determining the correct direction of the induced current. This highlights the importance of both the geometry of the setup and the principles of electromagnetic induction.
Gabriele Pinna
Messages
14
Reaction score
1
If there is a rotating wire in a constant magnetic field what is the direction of the induced current ?
The problem is the direction of the area vector which is arbitrary, if it is parallel to the magnetic field the current will flow in a direction, if it is anti-parallel it will flow in the opposite direction.
What is wrong ?
 
Physics news on Phys.org
Are you familiar with Lenz's law?
 
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...
Back
Top