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

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

Question 2. If three objects of same mass are dropped from different heights h1, h2 & h3 such that h1 > h2 < h....is true about their corresponding potential energy (PE1, PE2 & PE3):

Question 3. Solar panels are used for harnessing solar energy. This solar energy is then used to charge an electric cell and this ....a toy. What are the energy changes that take place?

Question 4. An arrow fired from a bow attains a maximum height of 5m from the level it is released. If the mass of the arrow is 50....following values? (Select all that apply ; Assume, (g = 10 ms−1)

Question 5. Statement 1: Force acting on a body increases its kinetic energy from 200 J to 400 J and this force does a positive wo....when the displacement is in the direction of force itself.

Question 6. A boy was playing with a spongy ball, compressing and releasing it. What will be the work done by the boy on the ....ball on the boy respectively at the time of compressing?

Question 7. Two boys were playing with a ball on a level ground. One of the boys throws the ball on the third floor of the bu....the ratio of the work done by both the boys?

Question 8. A child is moving on a skateboard at the speed of 2 ms−1. After a force acts on him, his speed become....by the force, if the weight of the child is 20 kg.

Question 9. A block of mass 5 kg is sliding on a smooth floor with a velocity of 20 ms−1. The amount of work required ....20 ms−1. The amount of work required to stop it is:

Question 10. A block of certain mass is sliding on a smooth floor with a certain velocity. The work required to stop it is ....a certain velocity. The work required to stop it is

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

GPOE / GPA Combined 1 Free Mock Test SAIL JO E-0 2024

Chapter 3.1 : INTRODUCTION Chapter 3 : Sinter Plant SAIL E0 - GPOE/GPA 2024

Chapter 2.3 : COAL HANDLING PLANT - Set 1 Chapter 2 : Coke Ovens and Coal Chemicals SAIL E0 - GPOE/GPA 2024

Chapter 1.1 : INTRODUCTION Chapter 1 : Raw Material Handling Plant SAIL E0 - GPOE/GPA 2024

DSP Combined 1 Free Revision Test SAIL JO E-0