An air conditioner draws 18 A at 220-V ac. The connectingcord is copper wire with a diameter of 1.628 mm. (a) Howmuch power does the air conditioner draw? (b) If the lengthof the cord (containing two wires) is 3.5 m, how much power isdissipated in the wiring? (c) If no. 12 wire, with a diameterof 2.053 mm, was used instead, how much power would bedissipated in the wiring? (d) Assuming that the air conditioner is run 12 h per day, how much money per month(30 days) would be saved by using no. 12 wire? Assumethat the cost of electricity is 12 cents per kWh.

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HVDC

HVDC stands for high voltage direct current in the electric power transmission system. The high voltage direct current system uses direct current (DC) for the transmission of electrical power through transmission lines in contrast with the alternating current that is the AC system. The HVDC is used to transmit bulk power point-to-point through long distances transmission lines. Power is rapidly transferred because the efficiency of transmission lines is greatly increased over long distances due to HVDC lines.