16
votes
4answers
2k views

Can two electrons get ever so close as to touch each other?

My friend and I were studying for our EM test when we started to think about what happens to the electric field near an infinite line of charge. $$E = \frac{\lambda}{2\pi\rho\epsilon_{0}}$$ As you ...
1
vote
1answer
54 views

Electron electric field

As we know the fundamental unit of charge in our universe at the time of electrodynamics was an electron, and in any frame of reference, its radius is a finite number and assuming uniform charge ...
0
votes
1answer
327 views

Electric field singularities

Is this the list of all possible types of singularities in electrostatic field $E$? near a point charge: $\frac{1}{r^2}$ near a line of charge: $\frac{1}{r}$ near the edge (not surface) of a ...
9
votes
2answers
2k views

Tension in a curved charged wire (electrostatic force) - does wire thickness matter?

Consider a conducting wire bent in a circle (alternatively, a perfectly smooth metal ring) with a positive (or negative) electric charge on it. Technically, this shape constitutes a torus. Assume ...