Conceptual Electric field question

[irishbob]

Homework Statement

Two solid spheres, both of radius 5 cm, carry identical total charges of 2 microcoulombs. Sphere A is a good conductor. Sphere B is an insulator, and its charge is distributed uniformly throughout its volume. How do the magnitudes of the electric fields they separately create at a radial distance of 6 cm compare?
A: Ea>Eb=0
B: Ea>Eb>0
C: Ea=Eb>0
D: Ea=Eb=0
E: 0<Ea<Eb
F: 0=Ea<Eb

How do the magnitudes of the electric fields they separately create at radius 4 cm compare? Chose from the same possibilities.

Homework Equations

E=K\frac{q}{r^2}

The Attempt at a Solution

Well I think it's C for both, but for some reason I'm not confident. I just want to make sure I'm understanding the question. So it's only asking about the electric field at a given point 6 (and 4) cm away without them anywhere near each other, meaning their fields are not interacting at all. Is this right?
This isn't for webassign, so I have no way to confirm.

 

[gneill]

Well I think it's C for both, but for some reason I'm not confident. I just want to make sure I'm understanding the question. So it's only asking about the electric field at a given point 6 (and 4) cm away without them anywhere near each other, meaning their fields are not interacting at all. Is this right?

That's the way I read it.

 

[irishbob]

Cool, just wanted to make sure. I understand this stuff pretty well conceptually, but I'm awful at interpreting the questions.