Uniform/nonuniform electric fields

[jaejoon89]

What makes the electric field uniform?

I learned it as a field that doesn't vary from place to place, but I'm trying to understand that better conceptually. For example, for problem #6 on the multiple choice
http://www.enc.edu/~john.u.free/PY%20202%202006-7/Resources/Exam_1_05-06.htm

Would all 3 produce a uniform field from + to -? What sort of arrangement would produce a nonuniform field?

Thanks!

 

[tiny-tim]

What makes the electric field uniform?

I learned it as a field that doesn't vary from place to place …

Hi jaejoon89!

(Yes, uniform means that it doesn't vary from place to place, at least within a relevant region.)

An electric field is generally not uniform.

There has to be a very good reason if it is.

Hint: electric fields can be represented by field lines.
So draw where you think the field lines are on those three diagrams.

 

[baba89]

The uniformity of an electric field refers to the consistency of its strength and direction throughout a given region. In other words, a uniform electric field has the same magnitude and direction at every point within that region. This can be visualized as equally spaced and parallel electric field lines.

In the context of the multiple choice problem mentioned, all three options would produce a uniform electric field from + to -. This is because in each case, the electric field lines are uniformly spaced and parallel, indicating a consistent field strength and direction.

On the other hand, a nonuniform electric field would have varying strength and/or direction at different points within the region. This could be caused by a variety of factors, such as the distribution of charges or the presence of conducting materials. For example, a point charge or a dipole arrangement would produce a nonuniform electric field.

In summary, the uniformity of an electric field is determined by the consistency of its strength and direction throughout a given region. A uniform electric field can be produced by equally spaced and parallel field lines, while a nonuniform field can be caused by various factors affecting the distribution of charges.