Q1) (30 p) By showing each step clearly,
(a) (15 p) Find electric field a distance r from a line of positive charge of infinite length and a constant charge per unit length 10 μμ/cm as shown in Figure by using Gauss’s law by drawing a figure and clearly indicating the electric field and other necessary parameters,
(b) (15 p) Find the electric potential between the points A which is 20 cm away from the line and B which is 50 cm away ,as shown in Figure