Question 2: A circular disk of radius a is uniformly charged with ps C/m². If the disk lies on the plane with its axis along the x-axis, find E at point (0, 0, h), where h > 0. From this, derive the E field due to an infinite sheet of charge on the z = 0 plane. Find E for (<<h). Sketch E as a function of (Wa).
Question 3: (a) The following charge distributions are present in free space: point charge 12 nC at P(2.0, 6), uniform line charge density 3 nC/m at x = 2, y = 3, and an infinite uniform surface charge density 0.2 nC/m² at x = 2. Find E at the origin. Determine the force acting on point charge 10 AC placed at the origin. Calculate the total electric flux leaving the surface of a sphere of 2 m radius centered at (2.0, 6).