Question

an electric bulb of 10 watt work for 4hw a day calculate the unit of energy consumed in 15 days

Answer 1

Heyaa..

Given, 
            Power = 10 W = 10 / 1000 = 0.01 kWh
            Time = 4h 

Energy consumes in 15 days will be 

          Energy = Power * Time
                       = 0.01 * 4h * 15
                       = 0.6 kWh

Hope it helps..

And here CutieBarbie