Question 88

An electric bulb of 100 W is used for 9 hours per day. What will be the 'units' of energy consumed in 1 day by the bulb?

Solution

An electric bulb of 100 W is used for 9 hours per day.

Energy consumed by bulb in one day $$= 9 \times100 W = 900 WH $$

And, we know, $$1 KWH=1000 WH = 1 unit $$

So,$$ 900 WH = 0.9 units$$.

Option A is correct.

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