Magnethos Posted April 8, 2008 Share Posted April 8, 2008 There is any relation between amperage and the magnetic field? Link to comment Share on other sites More sharing options...
swansont Posted April 8, 2008 Share Posted April 8, 2008 Yes, the field at any point depends on the current. For a straight wire or coil it's linear, though for other configurations the relationship can be more complicated. Link to comment Share on other sites More sharing options...
NeonBlack Posted April 9, 2008 Share Posted April 9, 2008 Christ, you sound like an engineer. It's called current. Off the top of my head, I cannot think of any practical case where magnetic field is not directly proportional to current. Link to comment Share on other sites More sharing options...
ydoaPs Posted April 9, 2008 Share Posted April 9, 2008 [math]{\nabla}{\times}{B}={\mu_0}{J}+{\mu_0}{\epsilon_0}{\frac{\partial{E}}{\partial{t}}}[/math] Where B is magnetic field, [math]\epsilon_0[/math] is permittivity of free space, E is the electric field, [math]\mu_0[/math] is magnetic permeability of free space, J is current density, and t is time. Link to comment Share on other sites More sharing options...
thedarkshade Posted April 9, 2008 Share Posted April 9, 2008 [math]{\nabla}{\times}{B}={\mu_0}{J}+{\mu_0}{\epsilon_0}{\frac{\partial{E}}{\partial{t}}}[/math] Where B is magnetic field, [math]\epsilon_0[/math] is permittivity of free space, E is the electric field, [math]\mu_0[/math] is magnetic permeability of free space, J is current density, and t is time. B = magnetic induction Link to comment Share on other sites More sharing options...
NeonBlack Posted April 9, 2008 Share Posted April 9, 2008 The B has nothing to do with induction. Link to comment Share on other sites More sharing options...
Klaynos Posted April 9, 2008 Share Posted April 9, 2008 B = magnetic induction It's field and should be a vector, which is not shown by pogo. As should E and J. Now the big question is is it Jfree? That is what we where always being asked last year... Link to comment Share on other sites More sharing options...
thedarkshade Posted April 9, 2008 Share Posted April 9, 2008 The B has nothing to do with induction. Ummm.. sure? http://en.wikipedia.org/wiki/Magnetic_induction Link to comment Share on other sites More sharing options...
NeonBlack Posted April 9, 2008 Share Posted April 9, 2008 Despite the link, I still stand by what I said. Magnetic induction describes an electric field or EMF which is created by a changing magnetic field Link to comment Share on other sites More sharing options...
Klaynos Posted April 10, 2008 Share Posted April 10, 2008 Magnetic induction is not incorrect, but normally in physics it's refered to as Magnetic Field, as it is infact a vector field as is E Link to comment Share on other sites More sharing options...
imp Posted April 10, 2008 Share Posted April 10, 2008 Christ, you sound like an engineer.It's called current. Off the top of my head, I cannot think of any practical case where magnetic field is not directly proportional to current. What DO Engineers sound like, anyway? imp Edit: I CAN think of a case eluding you as above, but as an Engineer, shall not reveal it. Link to comment Share on other sites More sharing options...
NeonBlack Posted April 10, 2008 Share Posted April 10, 2008 In general, I'll admit that I don't know what engineers sound like. It just reminded me of one time I heard a couple of engineering students talking about "wattage." I can only assume they meant power. One time I saw a label which gave a rating for some instrument or machine used by engineers. The units on it were something like BTUs/hour/square root hertz. If I give someone a hard time about this, I mean it jokingly. I've never met anyone who was appalled by the use of the term "voltage." edit: What did you have in mind? Link to comment Share on other sites More sharing options...
Klaynos Posted April 10, 2008 Share Posted April 10, 2008 In general, I'll admit that I don't know what engineers sound like. It just reminded me of one time I heard a couple of engineering students talking about "wattage." I can only assume they meant power. One time I saw a label which gave a rating for some instrument or machine used by engineers. The units on it were something like BTUs/hour/square root hertz.If I give someone a hard time about this, I mean it jokingly. I've never met anyone who was appalled by the use of the term "voltage." edit: What did you have in mind? Ironically the term magnetic induction is used more by engineers Link to comment Share on other sites More sharing options...
thedarkshade Posted April 10, 2008 Share Posted April 10, 2008 Ye got to listen to me sometimes ye know:rolleyes: Link to comment Share on other sites More sharing options...
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