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Question
In what unit does the electric meter in a house measure the electrical energy consumed? What is its value in S.I unit?
Solution
The domestic electric meter measure the electrical consumption in kilowatt-hour (kwh).
1 kWh = 1 kilowatt × 1 hour
= 1000 Js-1 × (60 × 60) s
= 3.6 × 106 J in S.I. unit.
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