Force Exerted on Ferromagnetic Object by Permanent Magnet

Click For Summary

Discussion Overview

The discussion revolves around determining the force exerted by a permanent magnet on a ferromagnetic object at varying distances. Participants explore the complexities involved in calculating this force, particularly focusing on the influence of different parameters such as the magnet's grade, size, and the ferromagnetic object's properties.

Discussion Character

  • Exploratory
  • Technical explanation
  • Experimental/applied

Main Points Raised

  • One participant seeks assistance in creating a spreadsheet to calculate the force exerted by a permanent magnet on a ferromagnetic object, emphasizing the importance of parameters like magnet grade, size, and distance.
  • Another participant expresses a similar interest but notes a lack of responses or solutions available online.
  • A later reply suggests that experimental methods may be more effective than calculations, citing the complexity and potential inaccuracies of the equations involved.
  • One participant agrees that calculations can only provide rough estimates, indicating a preference for trial and error approaches in experimentation.

Areas of Agreement / Disagreement

Participants generally agree on the complexity of calculations and the potential inaccuracies involved, leaning towards experimental methods. However, there is no consensus on a specific approach or solution to the problem presented.

Contextual Notes

Participants acknowledge that the calculations for determining the force can be difficult and may not yield precise results, suggesting that assumptions about the shape of the magnet and other variables could impact outcomes.

korneld
Messages
22
Reaction score
0
Hello everyone. There is a little project I could use some help with.

I would like this done in a spreadsheet, so I can mess around with different values.

The Problem:

On one hand, I have a permanent magnet and, on the other, I have a ferromagnetic object. I want to find out the force the magnet is exerting on my object from any given distance.
If I’m not mistaken, one of the bigger issues here is the shape of the magnet, because that can affect flux density. Let’s work with a nice, generic shape.

The values I’d like to play around with are:

  • the grade of the magnet
  • the size of the magnet
  • the composition of the ferromagnetic object
  • the size of the ferromagnetic object
  • the distance between the two

I want to keep it simple. I don’t need the spreadsheet to have all the information stored on all neodymium magnets from N27 to N64. It should just tell me the different inputs it needs, and I’d be more than happy to look them up. The same goes for the ferromagnetic object.

Thanks in advance.
 
Last edited by a moderator:
Physics news on Phys.org
Hello.. I have a very similar problem. Did you make any progress with this? No one on the internet seems to no the answer.. hehe
 
No, unfortunately everyone pretty much ignored it. Not sure why. I think, though, that it's probably best to do this experimentally. Calculations for this stuff can be difficult I'm told, and ultimately inaccurate.
 
Thanks for the reply.
Yup, the calculations do seem to be complex and even then, if the equations are solved, they only give rough estimates. :(
Trial and error it is then..
 

Similar threads

Graduate Practical demo - Ferromagnetic attraction at interpole boundary
  • · Replies 0 ·
Replies
0
Views
285
Undergrad Is this analogy between Magnetic Force and Gravitational Force accurate in helping to understand what contributes more to a stronger magnetic force?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Ferromagnetism: Permanent Magnetic Force and Kinetic Energy
  • · Replies 9 ·
Replies
9
Views
2K
Graduate Force on a ferrous object in a saturating magnetic field
  • · Replies 9 ·
Replies
9
Views
2K
High School Force Exerted on a Conductor by a Homogeneous Magnetic Field
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Measuring change of magnetic field strengh over distance
  • · Replies 8 ·
Replies
8
Views
1K
Graduate Momentum transfer between d-electrons and the nucleus in ferromagnetism?
  • · Replies 11 ·
Replies
11
Views
2K
Undergrad Permanent Magnetic Dipole in an electromagnetic field
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Does Larmor precession change the force exerted on a magnetic dipole?
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Questions related to magnetic shielding separating two like poles
  • · Replies 6 ·
Replies
6
Views
1K