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NCERT Question 9 A certain household has consumed 250 units of energy during a month. How much energy is this in joules? Energy in households is measured in Kilo Watt Hour 1 unit = 1 kWh Now, 1 kWh = 3.6 × 106 J 250 kWh = 250 × 3.6 × 106 = 250 × 36/10 × 106 = 900 × 106 = 9 × 108 J ∴ 250 units = 250 kWh = 9 × 108 J

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CA Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo