A bulb of rating 100w 220v is used for 5 hours daily for a month of 30 days how many units of electric energy are consumed by the bulb in one month
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We know that
Electric energy (in kWh) =
power (in W) * time (in Hour) /1000
Here the power of bulb = 100W
Time consumed = 5 hr
no. of days =30 days
so energy =
100W * 5 hr * 30days/1000
5 * 3 = 15kWh
Thus the energy consumed by the bulb is 15kWh in 30 days.....
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