B Understanding magnetic flux change during the falling of magnet

AI Thread Summary
Dropping a neodymium magnet into an electromagnetic coil induces voltage due to changes in magnetic flux. The discussion revolves around whether the change in induced EMF is a result of alterations in magnetic flux density or cross-sectional area during the magnet's fall. Participants explore methods to calculate these values without relying on experimental results, emphasizing the importance of understanding electromagnetic principles. The conversation references advanced physics concepts, suggesting a foundational knowledge in the subject is beneficial for deeper comprehension. Understanding these factors is crucial for accurately predicting induced EMF in similar scenarios.
RED3RED3
Messages
1
Reaction score
0
TL;DR Summary
What's the factor which induce EMF in case of falling magnet into the coil
If I drop the magnet into the electromagnetic coil, is magnetic flux density changed or cross sectional area changed during its falling? Actually I dropped a neodymium magnet into the coil and there was the voltage induced but I don't know what's the factor that induce the EMF in this case. Also if there is change of magnetic flux density or cross sectional area, how can I calculate those value without using experimental result I mean the induced EMF value.
 
Physics news on Phys.org

Thread 'Maxwell stress tensor'

This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...
View full post »
Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...
View full post »

Similar threads

I How induction works within a coil (nuances of it)
Replies
6
Views
2K
B Experiment issues (electromagnetism)
Replies
42
Views
2K
I Mutual inductance in a transformer
Replies
16
Views
4K
High School Magnetic Field Lab
Replies
12
Views
2K
Inducing EMF Through a Coil: Understanding Flux
4
Replies
191
Views
20K
Induced current in a coil from a constant uniform magnetic field?
Replies
5
Views
2K
Why does a change of magnetic flux induce an EMF?
Replies
7
Views
3K
Why does the speed of the magnet matter in a coil?
Replies
6
Views
4K
Electromagnetic induction question, coils and magnets
Replies
9
Views
2K
Flux in a Uniform Magnetic Field
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top