Q1) The interior lighting of refrigerator is provided byincandescent lamps whose switches are actuated by the opening ofthe refrigerator door. Consider a refrigerator whose 50 W lightbulb remains switched on continuously as a result of malfunction ofthe switch. If the refrigerator has a coefficient of performance of1.25 and the cost of electricity is 9 pence per kWh, determine theincrease in the energy consumption of the refrigerator and its costper year (365 days) if the switch is not fixed. You may assume thatthe refrigerator is opened 30 times per day for an average of 20seconds on each occasion.
