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I get the attraction between A and B but how will be there a repulsion between X and Y?
lol honestly I can't be of much halp here. I just started physics :o
what do you think the big difference is between current carrying wire and electron beam
Actually field should be in reverse direction for electron beam because in that case the direction of current is opposite.|dw:1443072865014:dw|
no better person to ask but him right now
oh right current is other sside then that makes sense
So, according to me there will be attraction between A and B and X and Y
lets suppose A and B are infinite wires
Repulsion between X and Y is only possible if somehow the repulsive force due to electric charge is greater than magnetic force.
i dont know ask jem
Thanks doe c;
the answer to this lies is special relativity. i can reproduce it off the top of my head but there is a one minute physics that tries to explain it.
founf it, sorry, it was by Veritasium but the art is from the 1 min physics guy https://www.youtube.com/watch?v=1TKSfAkWWN0
WoW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I never knew this..... Thank you so much but my answer still remains unanswered :(. I am not able to understand why two electron beams will repel each other when moving in same direction. Shouldn't they attract each other because they constitute current in same direction and current moving in same direction attract each other.
It's a simpler matter than that. Electrons are negatively charged, so if you have two beams traveling near each other they will repel. That will happen whether the beams are traveling in the same direction or not. Because there is a current there is also a magnetic field being generated, but the force due to the magnetic field is vastly smaller than the electrostatic force so it doesn't really matter. In the case of a current-carrying wire, the particles that are moving are the electrons but the wire is full of stationary protons, so the wires are neutral and there's no repulsion. In this case, the generated magnetic field is the only thing acting on the wires and so you get attraction if the currents are in the same direction and repulsion if they're traveling in opposite directions. As a reference to special relativity - as it turns out, due to relativistic effects it turns out that the wires don't see each other as *exactly* electrically neutral, which leads to an attraction between them. This is one of the first simple hints that magnetism is really just an effect of special relativity, and that electricity and magnetism are just different ways to see the same thing.
What they said
Thanks @Jemurray3 , that's what I was looking for..