Determine if approximate cylindrical symmetry holds for the following situations. state why or why not. (a) a 350 cm long copper rod of radius 3 cm is charged with +450 nc of charge and we seek an electric field at a point 9 cm from the center of the rod. cylindrical symmetry holds cylindrical symmetry does not hold why or why not? the length of the rod is much greater than the distance to the point in question. the length of the rod is of the same order of magnitude as the distance to the point in question. the material that makes up the rod is not a conductor. the electric field inside the rod is zero. (b) a 14 cm long copper rod of radius 3 cm is charged with +450 nc of charge and we seek an electric field at a point 9 cm from the center of the rod. cylindrical symmetry holds cylindrical symmetry does not hold why or why not? the length of the rod is much greater than the distance to the point in question. the length of the rod is of the same order of magnitude as the distance to the point in question. the material that makes up the rod is not a conductor. the electric field inside the rod is zero.