Question

Which uses more energy,a 800W refrigerator that operates for 8 hours a day or a 60W bulb that operates for 10 hours a day?

Answer 1

Wattage or electric power rating of the refrigerator:  800 Watts

Energy consumed by the refrigerator per day:
   E = Power * time duration
   E = 800 W *  8 hrs = 6,400 Joules

Energy consumed by the bulb :
   E = 60 W * 10 hrs = 600 Joules.

So the refrigerator consumes more energy.