A small object A, electrically charged, creates an electric field. At a point P located 0.250m directly north of A, the field has a value of 40.0N/C directed to the south.
What is the charge of object A?
E = (KQ)/r^2
The Attempt at a Solution
After manipulating the above equation, I found out that the charge Q = (E*r^2)/K
Q = (E*r^2)/K
makes sense to me, but should it be negative or positive?