# What is the electric field at the center (in N/C)?

1. Apr 6, 2008

### NegaChin

A total of eight tiny conducting spheres, each carrying a charge of -110 nC, are placed one each at the corners of a cube 1.2 m on a side. Find the potential at the center (in V).

What is the electric field at the center (in N/C)?

2. Apr 6, 2008

### pam

Just add up the eight potentials.
Use symmetry for E.

3. Apr 6, 2008

### NegaChin

I understand, but how do I find the potential to begin with?

4. Apr 6, 2008

### jae05

$$V=\frac{q}{4\pi\epsilon_0r}$$

5. Apr 7, 2008

### NegaChin

Just a Clarification

should leave the q as neg. and nC or convert to C and make positive?;