Assignment Booklet 10 4. In a Millikan type experiment, two horizontal charged plates are 2.5 cm apart. A latex sphere of 1.3 x 10:" kg remains stationary between the plates when the potential difference between the plates is 400 V with the upper plate charged positive. a. What is the type of charge on the sphere? 2 b. What is the electric field intensity between the plates? c. What is the charge on the sphere