an electric bulb of 100w is used for 8hr per day. calculate the units of energy consumed in one day by the bulb.
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Answered by
38
Power is equal to energy upon time and energy is equal to power into time energy consumed by the bulb in 8 hours is equal to its power into time that is equal to 100 into 1 hour which is equal to 100 into 60 into 60 that is equal to 360000 joule hope it may help you
Answered by
12
Given,
Electrical power of a bulb = 100 watts
Total time of operation of the bulb = 8 hours per day
To find,
Total units of energy consumed in one day by the bulb.
Solution,
We can simply solve this numerical problem by using the following process:
Mathematically,
Power (P)
= Energy consumed (E) ÷ Time (T)
=> Energy consumed (E) = Power (P) x Time (T)
Now,
Total units of energy consumed in one day by the bulb = Power (P) x Time (T)
= 100 W x 8 hours
= 8000 Wh
= 0.8 kWh = 0.8 electrical units
( Since 1 kWh = 1 electrical unit )
Hence, a total of 0.8 electrical units of energy is consumed in one day by the bulb.
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