1. Question DC power can be transmitted using a wire over distances of a couple miles. On the contrary, AC power may be transmitted using a wire over much greater distances. a) What physical quantity needs to be minimized to maximize the reach of wired power transmission from a power station to a final user (house, factory, etc.)? b) What physical quantity was accordingly changed at the AC power station? c) Why would have this change not be acceptable for the final user at the end of the transmission line if the power station was instead transferring DC power? d) Any lamp powered in DC produces a yellow light, but produces a white light when powered in AC. This occurs although the average power (the average rate at which energy is dissipated by the heated filament) is exactly the same in the two cases. Why? (This requires some additional investigation on your part on what property confers a hot body a certain color.) 2. Relevant equations Ohm's Law: I = V/R Resistance = pL/A 3. Attempt at solution a) the physical quantity that needs to be minimized is the resistance. b) Voltage c) DC current can not be bumped or down in strength like AC current. DC Current loses power quickly because it travels only in one direction. d) the difference in color is due to the electrons, in the material heated, being excited and releasing a certain wavelength. Any input/corrections/help?