Impossible electric fields examples?

1. Nov 30, 2012

mishima

I was trying to think of more impossible electric fields than my book has. I understand it is anything that breaks the rule that the path integral is zero. One example is a circular field. I was trying to picture some more complicated 3d examples.

Are all magnetic fields an impossible electric field? I just mean visually, in appearance.

2. Nov 30, 2012

HomogenousCow

You can have any kind of electric field so long as they obey the boundary relations.
"Path integral" (The correct term is line integral, a path integral is something we use in quantum mechanics) being zero around a loop is only true for an electric field generated by stationary charges, in general accelerating charges will generate non conservative electric fields.

3. Nov 30, 2012

mishima

Thanks, and yes I was trying to say something like "closed path line integral" I think.

So, I could use a computer simulation that generates magnetic fields and moving charges to "see" some impossible electric fields?

Such as the 3d magnetostatics one here: http://www.falstad.com/mathphysics.html ?