The current through a 10 V tungsten filament lamp connected to a 10 V source of negligible resistance is 2 A. Calculate the electrical energy (in kWh) consumed in 5 hours.
In a house 5 CF lamps each of 24 W works for a period of 5 hours and 2 fans of 80 W for 5 hours. What is the electric consumption in kWh for a month?