An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.

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  1. Class 10
  2. Chapter 12 Class 10 - Electricity

Transcript

NCERT Question 17 An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater. Given Resistance = R = 8 Ξ© Current = I = 15 A Time = t = 2 hours We know that, Rate at which heat is developed = πΈπ‘›π‘’π‘Ÿπ‘”π‘¦/π‘‡π‘–π‘šπ‘’ = Power Now, Power = I2 R = (15)2 (8) = 225 Γ— 8 = 1800 W Rate of change of heat is 1800 W Note: This answer does not match the end of the book answer. If we have made a mistake, please comment below

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo