Actually, it'll be an electromagnetic field, not a pure magnetic field.Yahya Sharif said:Let's say we have a wire and a circuit is closed the magnetic field start to spread with speed of light c.
haha I am in physics II right now and this totally blew my mind. We just learned about Maxwell's equations and now I learned they have some sort of contradiction and they still don't describe everything. ThanksIbix said:Actually, it'll be an electromagnetic field, not a pure magnetic field.
You need to look up the Lienard-Wiechert potentials, which describe fields from general moving charges. The maths is not simple, I'm afraid.
I'm afraid I don't understand this comment. There are no contradictions that I'm aware of, and the only thing Maxwell's equations don't cover in electromagnetism is quantum theory.khamo said:We just learned about Maxwell's equations and now I learned they have some sort of contradiction and they still don't describe everything.
Ibix said:I'm afraid I don't understand this comment. There are no contradictions that I'm aware of, and the only thing Maxwell's equations don't cover in electromagnetism is quantum theory.
Edit: The Lienard-Wiechert potentials, if that's what you are referring to with "don't describe everything", are a solution to Maxwell's equations for a particular scenario.
Which article? People here can better address the problems or contradictions that it discusses if they can actually read it for themselves.khamo said:in the article
Guessing at the meaning...khamo said:We just learned about Maxwell's equations and now I learned they have some sort of contradiction and they still don't describe everything.
Right i guess that was the general point i was alluding to.jbriggs444 said:Guessing at the meaning...
Maxwell's equations by themselves are self-consistent. No contradictions. But if you add the principle of relativity (the laws of physics are unchanged regardless of the choice of inertial reference frame) and if you try to transform measurements between frames using the Galilean transforms then contradictions emerge.
One way out is to hypothesize a medium against which electromagnetism operates -- the ether. Another way out is to use the Lorentz transform and discard the notion of absolute time. The result is Special Relativity.
Maxwell's equations do not describe everything. They do not describe gravity, the strong nuclear interaction, or the photoelectric effect.
The magnetic force is a type of force that is exerted between two magnets or between a magnet and a magnetic material. It is caused by the movement of electrically charged particles, such as electrons.
The strength of the magnetic force decreases as the distance between the source of the magnetic field and the object it is acting upon increases. This is known as the inverse square law, meaning that the force decreases by the square of the distance.
Yes, the magnetic force will eventually fall off to zero as the distance from the source increases. However, the rate at which it decreases depends on the strength of the magnetic field and the distance between the objects.
No, the magnetic force is not typically felt by humans at a distance from the source. This is because the force is relatively weak and only affects objects that are sensitive to magnetic fields, such as other magnets or magnetic materials.
The magnetic force is generally weaker than other types of forces, such as gravity or the electric force. However, it can still have a significant impact on objects that are sensitive to magnetic fields, such as compass needles or electronic devices.