Equation of force acting between two magnetic poles
Answers
hi,
Let us to be a little bit more explicit. The permanent magnet is a source of magnetic field H and induction B which are non uniformly distributed in space. If a charge body approach its motion depends of the relative velocity v, the electric charge q and the magnetic induction following Lorentz formula
F= q v x B
where you can see that the velocity v is always orthogonal to B and therefore there is no exchange of energy.
The permanent magnet can also interact with other magnet. For calculating the interaction of these two magnets it is convenient to consider two ideal cases:
1. each magnet is formed by two poles (north and south) that can be interacting independently if the magnets are long enough
F= μ g1 g2 / 4ᴫ r2
Where g1 and g2 are magnetic poles in ampere-meter, μ is the magnetic permeability of the medium in tesla-meter per ampere and r the distance between the poles. N-n and s-s repelrepel while n-s or s-n attract.
2. if the mangnets are short enough and its poles are closer each other,, then you can consider it a magnetic dipole and two magnets will interact as
F= 3 μ0/4 ᴫ r5 [((r x m1) x m2 + (r x m2) x m1 -2 r (m1.m2)) + 5 r (r x m1).(r x m2)/ r3]
Given that the magnetic fields distribute quite non uniformly in space and which depends non linearly of the direction between the dipoles, it is very difficult to generalize the formulae and the best is to go to one text as the one that I have recommended you.
HOPE IT HELPED
PLS MARK AS BRAINLIST!!
F=qvB sin¢
buy this you can found value of f by putting the value of charge q and velocity v and magnetic field B