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Question 3 Page 156 A lamp consumes 1000 J of electrical energy in 10 s. What is its power? Energy consumed = 1000 J Time taken = 10 s Power = (πΈπ‘›π‘’π‘Ÿπ‘”π‘¦ π‘π‘œπ‘›π‘ π‘’π‘šπ‘’π‘‘)/(π‘‡π‘–π‘šπ‘’ π‘‘π‘Žπ‘˜π‘’π‘›) = 1000/10 = 100 J/s = 100 W Power of lamp is 100 W

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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