What are the diameters of the disks?

What are the diameters of the disks? Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. Transferring 1.80 ×109 electrons from one disk to the other causes the electric field strength to be 3.40 ×105N/C. Do we need to consider the plate spacing if we know the field strength? Charge (Q) = (1.80 … Read more