4. 2 By considering the electric forces acting and Newton's second law, explain the type of motion occurring in a non-uniform electric field. 3 5. In which direction must a test charge be moved within an electric field if potential energy is to be stored in the system? Explain. (Consider both positive and negative charges.) (5 6. A student wanted to determine if the electric potential varied inversely as the square of the distance in a non-uniform field. Data collected was organized in the table below. Analyze the data and determine if the electric potential varies inversely as the square of the distance in a non-uniform field. Distance of Test Electric Potential Charge from Source (x10* V) Charge (m) 100 27.0 200 13.5 300 8.99 400 6.74 500 5.39 600 4.49