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Under 1.irhat condition is the equation U = mgh valid for gravitational potential energy? D The reference point is at the ground. C) There are no charges in the region. Q The gravitational eld is constant in the region. C) The mass of the object is 1 kg. \fIf an electron is placed in an electric eld that paints tn the light, I.Il'hich way should the electron he moved an that it stores positive electric potential energy? O to the right C) to the lelt 0 up D dawn C) anyr of these \fA proton begins at the negative plate of a parallel plate capacitor. The plates are separated by 12 cm and generate a constant electric eld at 2602 WC directed from the posilive plate to the negative plate. The proton is "launched" with an inilial velocitv of 3 x 11)5 mils at an angle of 31]\" from the hprizontaL What is the maximum height that the proton achieves above the negative plate before falling back down? Express vcur answer in centimeters. \fConsider the space between the plates bf a charged parallel plate capabitbr. Where does the electric eld have the greatest strength? 0 near the ppsitive plate 0 near the negative plate C} at the midpoint between the plates C} the field is the same at all locations between the plates