Question 7 of 9 0.53 / 1 WIN - Current Attempt in Progress 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 +10.0 JC and the instrument indicates that the electric force exerted on it is 20.0 pN, due east. What are the magnitude and direction of the electric field? E = (b) What are the magnitude and direction of the electric field if the object has a charge of -20.0 JC and the instrument indicates that the force is 10.0 uN, due west? E = HI