1- The figure below shows three charged particles, all lying along the horizontal axis. Particle A, at left, has a 6.50 nC charge. Particle B has a 1.40 nC charge and is 3.00 cm to the right of A. Particle C has a -2.70 nC charge and is 2.00 cm to the right of B. 1 B c 3.00 cm 2.00 cm - (a) Find the magnitude (in N) and direction of the net electric force on charge. (b) Find the magnitude and direction of electric field at the location of Particle A. 2- In the figure below, determine the point (other than infinity) at which the total electric field is zero. 1.0 m -2.5 MC 6.0 uC 3- A very large nonconducting plate lying in the xy-plane carries a charge per unit area of 90. A second such plate located at z = 2.25 cm and oriented parallel to the xy-plane carries a charge per unit area of -60. Find the electric field for the following. (a) z2.25. 4- A 3.0 cm diameter brass sphere has been given a charge of 4.5 nc. (a) What are the electric flux and the electric field strength atr = 1.0 cm from the center of the sphere? (b) What are the electric flux and the electric field strength at r = 4.0 cm from the center of the sphere? ( 3 marks)