Chapter 1 ELECTRIC CHARGE 1- The electron and proton of a hydrogen atom are separated (on the average) by a distance of approximately 5.3 x 10" m. Find the magnitudes of the electric force and the gravitational force between the two particles. 2- Three point charges lie along the x axis as shown in Figure 1. The positive charge qi=15.0 uC is at x = 2.00 m, the positive charge q2 = 6.00 uC is at the origin, and the resultant force acting on q3 is zero. What is the x coordinate of q3? 2.00 m - 2.00 - x - F23 93 F13 91 Figure 1 3- A charge of +3 UC is at a point P where the electric field is directed to the right and has a magnitude of 4 x 10 N/C. If the charge is replaced with a -3 uC charge, what happens to the electric field at P? 4- An object having a net charge of 24.0 uC is placed in a uniform electric field of 610 N/C that is directed vertically. What is the mass of this object if it "floats" in the field? 5- In Figure 2, determine the point (other than infinity) at which the electric field is zero. -1.00 m -2.50 HC 6.00 HC Figure 2 6- Three point charges are arranged as shown in Figure 3. (a) Find the vector electric field that the 6.00 nC and -3.00 nC charges together create at the origin. (b) Find the vector force on the 5.00 nC charge. 5.00 nC 0.300 m 6,00 nC 0.100 m -3.00 nC Figure 3 7- Rank the magnitude of the electric field at points A, B, and C shown in Figure 4 (greatest magnitude first). Figure 4