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Last updated at June 8, 2019 by Teachoo

Transcript

NCERT Question 20 Find the energy in kWh consumed in 10 hours by four devices of power 500 W each. Power of 1 device = 500 W Power of 4 devices = 4 Γ 500 W = 2000 W Time taken = 10 hours We know that Power = (πΈπππππ¦ ππππ π’πππ)/(ππππ π‘ππππ) Energy consumed = Power Γ Time taken = 2000 Γ 10 = 20000 Wh = 20000/1000 kWh = 20 kWh Energy consumed is 20 kWh

NCERT Questions

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NCERT Question 20 You are here

NCERT Question 21

Class 9

Chapter 11 Class 9 - Work and Energy

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.