Question

A uniform electric field exists in which of the following regions?

I. Around an infinite line of uniform linear charge density.
II. On either side of an infinite thin sheet of uniform charge density.
III. Between the spherical shells of a charged spherical capacitor.

a. I only
b. Il only
c. Ill only
d. II and III only
e. I, II and III

Answer 1

electric field formed we see that the field is uniform only for a sheet of uniform charge, so the correct answer is b

Step-by-step explanation:

Let's analyze the shape of the electro field in each given configuration

i) a charge line.

Using Gauss's law the field varies inversely with the distance

E = 2K λ / r

ii) an infinite leaf. the electric field is

E = σ / 2ε₀

iii) two spherical shells

in this case the charge can be considered centered in the center of each shell and the electric field is

E = k q / r²

for each shel linterior

The outer shell does not create an electric field in the space between them

When examining each electric field formed we see that the field is uniform only for a sheet of uniform charge, so the correct answer is b