Suppose you want to determine the electric field in a certain region of space. You have a small object of known charge and aninstrument that measures the magnitude and direction of the forceexerted on the object by the electric field.
(a) The object has a charge of +10.0 μCand the instrument indicates that the electric force exerted on itis 40.0 μN, due east. What are the magnitude and direction of the electric field?
(b) What are the magnitude and directionof the electric field if the object has a charge of -10.0 μC andthe instrument indicates that the force is 35.0 μN, duewest?