All Questions
12
questions
56
votes
13
answers
23k
views
Is there an intuitive explanation for why Lorentz force is perpendicular to a particle's velocity and the magnetic field?
The Lorentz force on a charged particle is perpendicular to the particle's velocity and the magnetic field it's moving through. This is obvious from the equation:
$$ \mathbf{F} = q\mathbf{v} \times \...
- 677
26
votes
6
answers
36k
views
Where do magnets get the energy to repel?
If I separate two magnets whose opposite poles are facing, I am adding energy. If I let go of the magnets, then presumably the energy that I added is used to move the magnets together again.
However, ...
- 363
6
votes
2
answers
4k
views
Magnetic Force on a Ferromagenetic Material
I am currently working on a project involving solenoids, and I needed a force(Newtons, not a measure of magnetic field strength) equation. What I came up with after some digging around on the internet,...
- 1,340
3
votes
3
answers
398
views
Detect reaction force to Lorentz force
If a charged particle is deflected in a magnetic field due to some magnet, is there any experiment that shows (or measures) the opposite reaction force (due to Newton's third law) on the magnet?
- 737
29
votes
11
answers
6k
views
Is there a more "physically mature" way to think about the right hand rule with electromagnetism?
I've always found using the righthand rule to remember how forces, B-fields, and particle velocities to be intellectually cheating myself a bit. It feels like being able to multiply numbers by using ...
- 719
4
votes
4
answers
5k
views
What is the *cause* of the Lorentz Force
Is it possible to explain what actually causes the force on a current carrying conductor in a magnetic field. I have read that this is due to the magnetic fields 'interacting' in some way.
This ...
- 195
-2
votes
3
answers
404
views
Is magnetic force pseudo?
Is magnetic force pseudo
Magnetic force exist only if charge is moving, so it must be pseudo.
Imagine, a positively charged man who has the same speed as electron (charge). So, he doesn't feel any ...
- 395
57
votes
4
answers
5k
views
Is there an underlying physical reason why the Coriolis force is similar to the magnetic component of the Lorentz force?
I couldn't help but notice that the expression for the magnetic component of the Lorentz force,
$$\mathbf F = q\,\mathbf v \times \mathbf B\,,$$
is very similar in its mathematical form to the ...
- 2,463
3
votes
1
answer
9k
views
Force between two bar magnets
I need to know how to calculate force between two bar magnets. I searched and found an answer on Wikipedia, but I don't really trust Wikipedia, a lot of crazy stuff is posted there.
So I searched ...
- 413
2
votes
1
answer
1k
views
Why don't power lines swing due to magnetic force between them?
I've learnt that any current carrying wire produces a magnetic field around it. Also two wires carrying current in the same direction attract each other, whereas, two wires carrying current in ...
- 5,306
1
vote
3
answers
250
views
Why is the cross product used in electrodynamics [closed]
For example, $F = I \times B$. Why would the force be perpendicular to both the magnetic field and the current? Why would the resultant force be totally unlike its 2 sources; this could be likened to ...
- 213
1
vote
4
answers
12k
views
Why do like charges repel and opposite charges attract? [duplicate]
Why do like charges repel and opposite charges attract?
