# Electric Field Question!

1. Oct 26, 2012

### Kennedy111

1. The problem statement, all variables and given/known data
A particle has a charge of -5.00 $\mu$C. At a point near this particle, the electric field strength is 7.2 x 10^7 N/C. Determine the distance from this point to the charged particle.

q = -5.00 x 10^-6 C
E = 7.2 x 10^7 N/C
k = 8.99 x 10^9 Nm^2/C^2

2. Relevant equations
E = kq / r^2

3. The attempt at a solution

r = (sqrt) (8.99 x 10^9 Nm^2/C^2)(5.00 x 10^-6) / (7.2 x 10^7 N/C)
= 0.0249861073 m

2. Oct 26, 2012