Understanding Magnetic Force: Formulas and Terminology

AI Thread Summary
To calculate the force between two magnetized objects with magnetic fields B1 and B2, it's important to note that magnetic fields do not exert forces on each other directly. Instead, they exert forces on moving charged particles or magnetized objects. The total magnetic energy in a system can be expressed as W = (1/2μ0)∫B2 dVvolume, and the force in the x-direction is given by Fx = ∂W/∂x. The terms 'a' and 'volume' refer to specific parameters in the context of magnetic fields, with 'volume' indicating the spatial extent over which the magnetic field is integrated. Understanding these concepts is crucial for accurately calculating magnetic forces.
neo2100
Messages
4
Reaction score
0
this is a very low level question:

I want to calculate the force that it is between two magnetic field .

PLZ give me a formula of it for B1 & B2.
 
Physics news on Phys.org
Magnetic fields don't exert forces on each other. Magnetic fields exert forces on moving charged particles, or on electric currents, or on magnetized objects.
 
I know that but I say my question in bad way.

mainly my question is about the force between two magnetized objects that have magnetic field (B1 & B2).
 
neo2100 said:
I know that but I say my question in bad way.

mainly my question is about the force between two magnetized objects that have magnetic field (B1 & B2).
Suppose the total magnetic energy stored in a system is

W = (1/2μ0)∫B2 dVvolume

Then the force in direction x is given by

Fx = ∂W/∂x

Bob S
 
thank you.

PLZ tell me that what 'a' & 'volume' means in a magnetic field?
 

Thread 'How to picture the vector potential?'

Susskind (in The Theoretical Minimum, volume 1, pages 203-205) writes the Lagrangian for the magnetic field as ##L=\frac m 2(\dot x^2+\dot y^2 + \dot z^2)+ \frac e c (\dot x A_x +\dot y A_y +\dot z A_z)## and then calculates ##\dot p_x =ma_x + \frac e c \frac d {dt} A_x=ma_x + \frac e c(\frac {\partial A_x} {\partial x}\dot x + \frac {\partial A_x} {\partial y}\dot y + \frac {\partial A_x} {\partial z}\dot z)##. I have problems with the last step. I might have written ##\frac {dA_x} {dt}...
View full post »
Thread 'Griffith, Electrodynamics, 4th Edition, Example 4.8. (Second part)'

Thread 'Griffith, Electrodynamics, 4th Edition, Example 4.8. (Second part)'

I am reading the Griffith, Electrodynamics book, 4th edition, Example 4.8. I want to understand some issues more correctly. It's a little bit difficult to understand now. > Example 4.8. Suppose the entire region below the plane ##z=0## in Fig. 4.28 is filled with uniform linear dielectric material of susceptibility ##\chi_e##. Calculate the force on a point charge ##q## situated a distance ##d## above the origin. In the page 196, in the first paragraph, the author argues as follows ...
View full post »

Similar threads

I Magnetic dipole and a torque
Replies
1
Views
716
A NMR flip angle - angle of nutation
Replies
2
Views
1K
I Does displacement current create a magnetic field? And Lorentz force?
Replies
10
Views
2K
I Hall effect -- is it always applicable?
Replies
7
Views
2K
I Direction of magnetic force
Replies
27
Views
1K
B Force Exerted on a Conductor by a Homogeneous Magnetic Field
Replies
1
Views
1K
I Questions related to magnetic shielding separating two like poles
Replies
6
Views
881
I Force between opposing magnets
Replies
7
Views
2K
I Calculation for proportional mechanical solenoid Force
Replies
3
Views
2K
Imperial-Metric Unit conversion for Magnetic Field Gradiometer?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top