Problem 2: Infinite uniform line charges of 5 nC/m lie along the (positive and negative) x and y axes in free space. Using the expression of E field that is obtained using Gauss's law, determine the electric field intensity at the following observation points: (a) P(0, 0, 4); (b) PB(0, 3, 4). [Ans. (a) 45 az V/m; (b) 10.8 ay + 36.9 az V/m.] Buoblem 2