Hold the charged rod horizontally. Use a charged pith ball to explore the region around the rod. On_t_l;1_t_e__l_;12_1_s_i_s_p_t_' your observations, sketch a vector to represent the net electric force on the ball at each of the points marked by an \""x. Is all the charge on the rod located at a single point? (e.g., Is all the charge at the tip of the rod? At the middle?) Explain how you can tell. The charge is not located at a single point. Most of the charge is located at the tip of the rod and then decreases as you move away from the tip of the rod. We can tell because when we bring the pith closer to the tip it attracts and slowly starts to lose attraction away from the tip. Qn_1_h_e__t_3_as_i_s__pf the vectors you have drawn, is it appropriate to consider the charged rod as a point charge? Explain. No, we would not consider the rod as a point charge because there is not one specic area of attraction. The charges are distributed along the m. The eld that the rod creates is not equal in all directions. C. Imagine that two charged rods are held together as shown and a charged pith ball is placed at point P. Predict whether the rod farther from point P would exert an electric force on the pith ball. Explain. We predict that thLit won't exert an electric force on the pith ball. x P Check your prediction by placing a charged pith ball at point P near two charged rods _.. J__ 2?\"ng __ _ ___J and then slowly moving one rod away from -. .. _' _ the other. Describe your observations and discuss with your partners whether your results from this experiment support your prediction. As we moved one rod away, the pith ball was getting attracted towards the other rod. D. Five short segments (labeled 1 5) of acrylic ~-----------~1 rod are arranged as shown. All were rubbed with silk and have the same magnitude 3: A charge. A charged pith ball is placed in turn B at the locations marked by points A and B. II: I: :33 :2 ,2. x Indicate the approximate direction of the force on the pith ball at points A and B due to segment 5 alone. Top view What is the direction of the net force on the ____._______-___ pith ball at points A and B? Explain how you determined your answer. Does segment 2 exert a force on the pith ball when the pith ball is placed at point B? Explain. B