# Homework Help: Electric field formula problem

1. Jan 26, 2012

### kirby2

An electric field of magnitude E is measured at a distance R from a point charge Q. If the charge is doubled to 2Q and the electric field is now measured at a distance of 2R from the charge, the new measured value of the field will be?

ATTEMPT: using the forumla E=(k)(q/r^2) i think the answer is E/2. is this right?

2. Jan 26, 2012

Looks good.