Example 11.9 - Chapter 11 Class 9 - Work and Energy (Term 2)
Last updated at June 8, 2019 by Teachoo
Last updated at June 8, 2019 by Teachoo
Transcript
Example 11.9 An electric bulb of 60 W is used for 6 h per day. Calculate the βunitsβ of energy consumed in one day by the bulb. Power of bulb = 60 W Time taken = t = 6 h Power = (πΈπππππ¦ ππππ π’πππ)/(ππππ π‘ππππ) Energy consumed = Power Γ Time taken = 60 Γ 6 = 360 Wh = 360/1000 kWh = 0.36 kWh 1000 W = 1 kW 1 W = 1/1000 kW We know that 1 kWh = 1 unit 0.36 kWh = 0.36 Γ 1 = 0.36 units β΄ Energy consumed by bulb is 0.36 units
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