charges/electric field

[pringless]

Suppose that the strength of the electric field about an isolated point charge has a certain value at a distance of 1 m. How will the electric field strength compare at a distance of 2 m from the point charge?

i think the field strength will be 1/4 at twice the distance. am i correct?

[Doc Al]

Originally posted by pringless
i think the field strength will be 1/4 at twice the distance. am i correct?
Right. The field from a point charge follows an inverse square law: E = \frac{kq}{r^2}