Millikan's Experiment 1 In a student experiment, a charge, q, on a plastic sphere of mass 7.2 x 10-16 kg, is suspended between two charged plates with a potential difference of 99 V and a plate separation of 4.5 mm. ( + ) 1 Based on the evidence given in Millikan's Experiment 1, the number of electrons lost or gained by the plastic sphere is: Select one: 0 3 O 30 O 2 O 20