A room has AC run for 5 hours a day at a voltage of 220V. The wiring of the room consists of Cu of 1 mm radius and a length of 10 m. Power consumption per day is 10 commercial units. What fraction of it goes in the joule heating in wires? What would happen if the wiring is made of aluminium of the same dimensions?
Energy consumed day=10 kWh
Energy consumed hour=2 kWh
Power=2kW
P=VI
V=220V
Heat
fractional loss in heating
HeatAl=7W
fractional loss in heating