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NCERT Question 14 An electric heater is rated 1500 W. How much energy does it use in 10 hours? Given Power = 1500 W Time taken = 10 hours We know that Power = (πΈπ‘›π‘’π‘Ÿπ‘”π‘¦ π‘π‘œπ‘›π‘ π‘’π‘šπ‘’π‘‘)/(π‘‡π‘–π‘šπ‘’ π‘‘π‘Žπ‘˜π‘’π‘›) Energy consumed = Power Γ— Time taken = 1500 Γ— 10 = 15000 Wh = 15000/1000 kWh = 15 kWh Energy consumed is 15 kWh

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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