Making a Prediction: Work out a relationship between the electric field from the plate E and the things can measure in this lab: the angle , and the mass (m) and charge (q) on the charged ball. You will need to show how you came up with this prediction in your lab summary. Determining from this relationship will serve as your measured value of , as it is derived from observed physical effect. Also work out a relationship between the expected value of for the circular plate and its charge and diameter