The formula I used is E=F/q so 50/15.0 x 10^-6 but it's saying that the answer I'm getting is incorrect. Please help with explanation

Your answer is partially correct. Suppose you want to determine the electric field in a certain region of space. You have a small object of known charge and an instrument that measures the magnitude and direction of the force exerted on the object by the electric field. (a) The object has a charge of +15.0 UC and the instrument indicates that the electric force exerted on it is 50.0 UN, due east. What are the magnitude and direction of the electric field? E = i 3333333.3 N/C + due east (b) What are the magnitude and direction of the electric field if the object has a charge of -10.0 UC and the instrument indicates that the force is 40.0 UN, due west? E= i 4000000 N/C + due east eTextbo