a charged balls A and B with the charge -100 u u C and +100 u C respectively are at a distance of 10 cm from each other. (a) Calculate the forces, in magnitude and direction, on the two balls. Draw a figure with forces to scale (b) How are the forces on A and B affected if the charge on A is doubled? Motivate. (2p) (c) Sketch the electric field around the two spheres (d) Place a positive test charge at any location in the field, and plot the electric force