2. The electric field on the surface of a perfect conductor is 2V/m. The conductor is immersed in water with ? = 80 ?0. The surface charge density on the conductor is ((?0 = 10-9/36p)F/m)
6. Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base fed at a frequency of 600 kHz. The radiation resistance of the antenna in ohms is
9. A transmission line is feeding 1 watt of power to a horn antenna having a gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free space is