A positively charged particle with a charge of 8.65pC is suspended in equilibrium in the electric field between two oppositely charged horizontal parallel plates. The square plates each have a charge of 2.50×10?5 C are separated by 6.50mm , and have an edge length of 9.00cm .
A)) Which plate must be positively charged? Top plate OR Bottom plate?
B)) Determine the mass of the particle in grams.