Q6. A house have following electrical appliances are operated as tabulated below and the AC mains voltage for all devices are 220V. Name of electrical The rated power of Operating hour Quantity appliance the electrical appliance each day Air conditioner 1.25KW 5 2 Light bulb 8OW 6 6 Refrigerator 100W 24 TV set 250W 8 2 (a) What are the electric energy consumed per day in watt-hour for above devices? (10%) (b) What is the total electric energy consumed in kilowatt-hour each week? (5%) (c) If the electric company charged $1.1 for each kilowatt-hour, what is the amount of the bill of payment for a month (assuming 30 days for a month)? (5%) (d) What is the total current of the supply if all the electrical loads are turned on? (10%) (e) As the available fossil fuel on the earth is reducing gradually, name six types of renewable energy that are possible to be the alternatives to power the above electrical appliances. (6%) (f) Give two disadvantages of using evacuated tubes compared with flat plates for solar thermal hot water system . (4%)