Current Growth due to Magnetic Induction

AI Thread Summary
The discussion centers on the factors affecting the rate of growth of current when an electromotive force (emf) is induced in a coil, referencing Faraday's law. The rate of change of magnetic flux directly influences the induced emf, with faster movement of a magnet relative to a solenoid resulting in a higher induced emf. Lenz's Law is also highlighted, indicating that the direction of induced current opposes the change that created it. Participants emphasize the importance of understanding these principles in the context of electromagnetic induction. Overall, a solid grasp of these concepts is essential for comprehending current growth in induced emf scenarios.
UncertaintyAjay
Messages
230
Reaction score
31
What factors affect the rate of growth of current when an emf is induced in a coil?
 
Physics news on Phys.org
UncertaintyAjay said:
What factors affect the rate of growth of current when an emf is induced in a coil?

First things first. Do you know about Faraday's law? And if you do, what do you understand from it?

It will be nice from now on if you provide MORE background of what you already know, rather than post a question like this and forcing us to figure out what you know after several leading posts. You should already know that this is what we need after more than 200 post on PF.

Zz.
 
Right. My bad. Yes I do know Faraday's law- rate of change of magnetic flux is the negative of induced emf. So basically, if I increase the rate at which flux through the solenoid increases or decreases, the induced emf is higher. So if you move a magnet towards or away from a solenoid, moving it faster increases the emf induced.The direction of the induced current is such as to oppose the change that produced it- that's Lenz's Law.

In case you're wondering, I am familiar with calculus. I'll be finishing high school in a couple months so that might also give you a rough idea of what I know.
 
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 »

Similar threads

I How induction works within a coil (nuances of it)
Replies
6
Views
2K
I How does a ferromagnet increase the inductance of an inductor?
Replies
3
Views
2K
I Mutual inductance in a transformer
Replies
16
Views
4K
B Antenna induction, oscillating circuit generating EM Waves
Replies
6
Views
2K
I Can a One Direction Transformer Prevent Reverse Induction in Primary Coil?
Replies
21
Views
2K
B Understanding magnetic flux change during the falling of magnet
Replies
1
Views
1K
Why does current need to vary in an inductor?
Replies
9
Views
2K
I Magnetic field at a point along the solenoid's axis but outside the solenoid
Replies
5
Views
2K
Is there a difference between Faraday’s induction experiments?
Replies
23
Views
2K
Lenz's law and instantaneous change in inductor's current
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top