27. the poynting vector of an electric dipole oscillating along z-axis is proportional to (a) (cos e) (b) f sine (c) 2 sine cos e (d) f sine cos?e where f is a

27. The Poynting vector of an electric dipole oscillating along z-axis is proportional to (A) (cos e) (B) f sine (C) 2 sine cos e (D) f sine cos?e Where f is a unit vector along the radial direction. The dipole is located at the origin.