Electric fields true or false question

[simsima_1]

Homework Statement

The electric fields created by a point charge, a conducting sphere and insulator sphere are identical, if they all have the same amount of charge and the field is measured outside the spheres.

Homework Equations

The Attempt at a Solution

I think its false...but how can you explain it

 

[Shooting Star]

What is the field (magnitude and direction) at a point, at a distance r from the centre, outside a uniformly charged hollow shell of infinitesimal thickness, if the total charge is q?

 

[Moetasim]

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Your answer is correct. The electric fields created by a point charge, a conducting sphere and insulator sphere are not identical, even if they all have the same amount of charge and the field is measured outside the spheres. This is because the distribution of charge and the material properties of the spheres affect the electric field. A point charge has a concentrated electric field, while a conducting sphere has a uniform electric field on its surface and an insulator sphere has a non-uniform electric field. Additionally, the electric field inside a conducting sphere is zero, while the electric field inside an insulator sphere is non-zero. Therefore, the electric fields created by these different objects are not identical.