NCERT Question 14 - Chapter 11 Class 9 - Work and Energy

Last updated at Dec. 16, 2024 by

Slide11.JPG

Slide12.JPG

Share on WhatsApp

Transcript

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

Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo