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प्रश्न
State (i) the S. I. unit, (ii) the household unit, of electrical energy. How are these units related?
उत्तर
(i) The S.I. unit of electrical energy is joule (J)
(ii) The household unit of electrical energy is kilo-watt hour (kWh).
Relationship: 1 kWh = 1 kW × 1h
= 1000W × 3600 s
= 3.6 × 106 J.
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