In a hydroelectric power plant, moving water is used for driving the wheels of a

Sail E0 Webinar

Question

In a hydroelectric power plant, moving water is used for driving the wheels of a turbine to generate electricity. If the change in kinetic energy of turbine is 1200 J in 2 minutes then the power generated is

Options:

A . 100 W

B . 10 W

C . 200 W

D . 20 W

Answer: Option B
:
B
Change in kinetic energy =1200 J
Time taken= 2 min = 120 s
The potential energy of the waterfall is utilised to move the turbine blades and the change in kinetic energy would be equal to the work done which is equal to 1200 J. Power is defined as the work done per unit time
Power =

\frac{w o r k d o n e}{t i m e} = \frac{1200}{120} = 10 W .

Was this answer helpful ?

Next Question

Submit Solution

More Questions on This Topic :

Question 1. A man eats glucose and then he makes a block move, which then comes to rest after sliding on a rough floor. The correct ....rough floor. The correct order of energy changes can be:

Question 2. Solar panels are used for harnessing solar energy. This solar energy is then used to charge an electric cell and this el....a toy. What are the energy changes that take place?

Question 3. A car accelerates from rest to 100 ms−1 in 10 seconds. If mass of the car is 50 kg then power developed by the en....is 50 kg then power developed by the engine is:

Question 4. Each time the heart beats, it requires 5 J of energy. If it beats 72 times in one minute then the power consumed by the ....then the power consumed by the heart is 360 W.

Question 5. The work done in shifting a baggage from the first floor of a building to the second floor is 100 J. The change in gravi....The change in gravitational potential energy of the baggage is:

Question 6. If three objects of same mass are dropped from different heights h1, h2 & h3 such that h1 > h2 < h3,....is true about their corresponding potential energy (PE1, PE2 & PE3):

Question 7. A child is moving on a skateboard at the speed of 2 ms−1. After a force acts on him, his speed becomes&....by the force, if the weight of the child is 20 kg.

Question 8. Statement 1: Force acting on a body increases its kinetic energy from 200 J to 400 J and this force does a positive work....when the displacement is in the direction of force itself.

Question 9. A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ba....ball on the boy respectively at the time of compressing?

Question 10. Two boys were playing with a ball on a level ground. One of the boys throws the ball on the third floor of the buil....the ratio of the work done by both the boys?

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Pie Chart - Test Paper 1 Data Interpretation Reasoning & DI

Tabulation - Test Paper 2 Data Interpretation Reasoning & DI

Test Paper 1 Direction Sense Test Reasoning & DI

ICA , RDIC,GFM Free Modal Test Paper - Non - Technical Branch Old Syllabus 2022 - SAIL Junior Officer E0

GFM Combined 1 Free Revision Test SAIL JO E-0