B Possible movement of this magnet?

  • B
  • Thread starter Thread starter abrek
  • Start date Start date
  • Tags Tags
    Magnetics Phisics
AI Thread Summary
A magnet placed on a surface with a strong negatively charged field will not experience repulsion or movement if it remains stationary and unchanged in angle. The type of surface, whether ferrous or non-ferrous, does not alter this outcome. While electrostatic forces may act on the magnet, they do not create a magnetic force on a stationary charge. Therefore, the magnet will not be repelled or move to the side. The interaction between the magnet and the charged surface does not lead to any movement.
abrek
Messages
14
Reaction score
1
TL;DR Summary
Magnit
If we take a surface with a strong negatively charged field and place a magnet in it in a specified position so that it does not change its angle, will the magnet be repelled and move to the side?
 

Attachments

  • Screenshot_2024-03-26-15-07-49-557_org.catrobat.paintroid.jpg
    Screenshot_2024-03-26-15-07-49-557_org.catrobat.paintroid.jpg
    21.2 KB · Views: 75
Physics news on Phys.org
Is the surface made of a ferrous metal (like iron or steel) or a non-ferrous metal (like aluminum)? Whether the surface is electrically charged or not should not affect the forces on the magnet per se -- You could get electrostatic forces on the metal of the magnet, but I don't think the magnetization would make a difference.
 
abrek said:
TL;DR Summary: Magnit

If we take a surface with a strong negatively charged field and place a magnet in it in a specified position so that it does not change its angle, will the magnet be repelled and move to the side?
There is no magnetic force on a stationary charge. So there will not be any repulsion as described.
 
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...
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...
Back
Top