Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
+1 vote
90 views
in Physics by (68.5k points)
closed by
What is power ? How do you differentiate killowatt from kilowatt hour ? The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized ? `(g = 10 m//s^2)`

1 Answer

0 votes
by (66.1k points)
selected by
 
Best answer
The rate of doing work is called power . Further , a kilowatt (kW) is the unit of power where 1 kW = 1000 W
= 1000 J//s and a kilowatt hour (kWh) is the unit of energy, where
`1 kWh = 1000 W xx 1h = (1000 J//s) (3600 s) = 36 xx 10^5 J`
Mass of water falling per minute, `m = 2000 tonnes = 2000 xx 10^3 kg = 2 xx 10^6 kg`
Height through which water falls, h = 20 m
PE of the water, `W = mgh = (2xx10^6) (10) (20) = 4xx 10^8 J`
Power of the falling water `=(W)/(t) = (4xx10^8 J)/(60 s) = (2//3) xx 10^7 W (as t =1 min. = 60s)`

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...