Determine if approximate cylindrical symmetry holds for the following situations. state why or why not. (a) a 400 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? o 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. o the material that makes up the rod is not a conductor e the electric field inside the rod is zero. (b) a 12 cm long copper rod of radius 3 cm is charged with +﹃s0 nc of charge and we seek an electric field at a point 9 cm from the center of the rod. o cylindrical symmetry holds o cylindrical symmetry does not hold why or why not? the length of the rad is much greater than the distance to the point in question. o 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. c) a 200 cm wooden rod is glued to a 200 cr plastic rod to make a 400 cm long od which is then painted with a charged part so ㎝at one obtains a uniform charge density. the radius of each od is 3 cm, and we seek an electric field at a point that is 4 cm from the center of the rod. o cylindrical symmetry holds e cylindrical symmetry does not hold why or why not? the length of the rad is much greater than the distance to the point in question the length of the rad is of the same order of magnitude as the distance to the point in question o the materials that make up the rods are not conductors. o the electric field inside the rod is zero. (d) same rod as (c), but we seek an electric field at a point that is 550 cm from the center of the rod. e cylindrical symmetry holds o cylindrical symmetry does not hold why or why not? o the length of the rad is much greater than the distance to the point in question. o the length of the rod is of the same order of magnitude as the distance to the point in question. the materials that make up the rods are not conductors. o the electric field inside the rod is zero