Magnitude and direction of electric fields? ?
how would you do the following? 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? (a)1.11×10^-9 c (b)-1.11x10^-9 c (c)2.78x10^-10 c (d)-2.78x10^-10 c (e)5.75x10^12 c (f)-5.75x10^12 c