Question

What is a uniform electric field ?

Answer 1

Hint:Here, you are asked about uniform electric fields. The thing you need to consider is the wording used here, it says uniform electric field and not just electric field. So, what you need to do here is, consider the definition of electric field and the meaning of the word uniform separately and then combine them to define the electric field using uniform as an adjective.

Complete answer:
The word uniform here is used to describe the type of electric field. In physics, by saying uniform we mean that the quantity in all cases and all time, remains the same. They do not change with time or do not change in any case.Electric field is a field generated by charge which is spread all over the space and the strength of the electric field depends on the distance of the point of interest from the source, that is the charge.

So, if you have an electric charge at origin and you have some other charged particle at some point, say point A, the charge on point A is under the influence of the charge at the origin. It experiences a force due to the electric field generated by the charge at origin. If you observe the electric at two different instants of time, the magnitude and direction of the electric field will not change and will remain the same forever, which means that the electric field is uniform.

So, a uniform electric field is a field in space which does not change its characteristics because of some other quantities.

Note:We split the terms uniform and electric field, defined the word and term individually and then combined them in order to determine the meaning of the whole term. You should keep in mind that by uniform what we mean is that in physics, if a quantity is uniform, it does not change with time or does not change in any case. If we change the medium, the magnitude of the electric field is changed but that does not mean that the electric is not uniform, the same field is acting but the only difference is that the original electric field strength just gets multiplied by some factor and that factor is actually the permittivity of the medium.