Question

An electric bulb of 60 w is used for 6 hrs. daily. calculate the ‘units' of energy consumed in one day by the bulb.

Answer 1

1 kWh is known as one unit of electric energy.
(1 kWh = 1000 Wh = 1000 × 3600 J = 36 × 10^5 J).
therefore ,60w=60x1000kw
fr 1hr=60000kwh
6hrs=6x60000kwh
=360000kwh energy
then energy in units =36 × 10^5 x360000
=1296x10^9 units

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