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Q.

An electric bulb of 60 W is used for 5 hours per day. Calculate the ‘units’ of energy consumed in one day by the bulb.

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a

0.30 units

b

0.20 units

c

0.26 units

d

0.36 units

answer is C.

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Detailed Solution

Power of electric bulb = 60 W = 0.06 kW.

Time used, t = 5 h

Energy = power × time taken

Energy = 0.06 kW × 5 h

Energy = 0.30 kW h

Energy = 0.30 units

The energy consumed by the bulb is 0.30 units.

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