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Q.

A certain household has consumed 250 units of energy during a month. How much energy is this in joules?


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a

9 × 108 J

b

7 × 108 J

c

9 × 107 J

d

8 × 108 J 

answer is A.

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Detailed Solution

The energy is 9 × 108 J.
Given data in the problem,
Energy consumed, E = 250 units
⇒                             E = 250 kW h ⇒                             E = 250 × 1000 × 60 × 60 ⇒                             E = 9 × 108J   
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