An electric bulb is rated as 50W, 220V. Calculate the energy consumed by the bulb in 20 minutes. Express your answer in commercial units of electric energy.

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Solution

So, if the bulb is rated at 50W and 220 V
Then the energy consumed at 220V in one hour is 50W.
So, if this has to be found out for 20 mins, then it is equal to 20/6050= 16.66 W
So, 1 unit of electricity is 1000 W.
This is 1000W is 1 unit
Then, 16.66 is 16.6610^-3units.

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