- #1
cse63146
- 452
- 0
Homework Statement
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.
A) 1.11×10^−9C
B) −1.11×10^−9C
C) 2.78×10^−10C
D) −2.78×10^−10C
E) 5.75×10^12C
F) −5.75×10^12C
What is the charge of object A?
Homework Equations
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
= (40*(0.25^2))/9×10^9
= 2.78×10^−10C
makes sense to me, but should it be negative or positive?