Question 28

An electric lamp of 100 W is used for 5 hours per day. How much energy will be consumed by the lamp in 3 days?

Solution

Energy consumed = Power x total time

Here, power = 100 W and time = 5 hours x 3 = 15 hours

Energy consumed = 100 x 15 = 1500 kW h or 1.5 units

Hence, option A is the correct answer.

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