An electric bulb of 100 W is used for 4 hrs a day. Calculate the energy consumed by it in a day in Joules and kilowatt hour unit.
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manishkr620520
We know, power=work done /time also, power = energy consumed /time therefore , in one day ,energy consumed =power *time =100*4*60 [since time is in hrs we will convert to seconds] = 24000 J therefore energy consumed in 15 days =24000*15 J = 360000 J
Answers & Comments
power=work done /time
also,
power = energy consumed /time
therefore , in one day ,energy consumed =power *time
=100*4*60 [since time is in hrs we will convert to seconds]
= 24000 J
therefore energy consumed in 15 days =24000*15 J
= 360000 J