CATCH UP CA FOR PHYSICS FOR ENGINEERS Exercise 1: Charge is distributed uniformly, starting at the origin, along the positive semi-infinite x axis with linear charge density. Determine the electric field at the point 0,0, z . Exercise 2: Consider a closed triangular box resting within a horizontal electric field of magnitude E 7.80 104 N C as shown in Figure 5. Calculate the electric flux through (a) the vertical rectangular surface, (b) the slanted surface, and (c) the entire surface of the box. Fig.5 Exercise 3: As shown in Figure 7a, a charge q1 2.0C is located at the origin and a charge q2 6.0C is located at 0, 3.0 m . (a) Find the total electric potential due to these charges at the point P, whose coordinates are 4.0,0 m . (b) Find the change in potential energy of the system of two charges plus a third charge q3 3.0C as the latter charge moves from infinity to point P (Fig. 7b). Fig.7 1