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Question 39: Which one of the following statements about power
Physics by Lakhmir Singh
Physics

Class 9

Lakhmir Singh

Author:
Lakhmir Singh
Publisher:
S. Chand
Subject:
Science
1

Chapter 1: Motion

117 questions

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2

Chapter 2: Force and Laws of Motion

114 questions

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3

Chapter 3: Gravitation

157 questions

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4

Chapter 4: Work and Energy

128 questions

Q1
Question 38: Which of the following energy change involves frictional force?

(a) chemical energy to heat energy
(b) kinetic energy to heat energy
(c) potential energy to sound energy
(d) chemical energy to kinetic energy
Q2
Question 39: Which one of the following statements about power stations is not true?

(a) hydroelectric power stations use water to drive turbines
(b) in a power station, turbines drive generators
(c) electricity from thermal power stations differs from that produced in hydroelectric power stations
(d) in hydroelectric power stations and thermal power stations, alternators produce electricity
Q3
Question 41: An object is falling freely from a height x. After it has fallen a height , it will possess :

(a) only potential energy
(b) only kinetic energy
(c) half potential and half kinetic energy
(d) less potential and more kinetic energy
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5

Chapter 5: Sound

162 questions

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Question

Question 39: Which one of the following statements about power stations is not true?

(a) hydroelectric power stations use water to drive turbines
(b) in a power station, turbines drive generators
(c) electricity from thermal power stations differs from that produced in hydroelectric power stations
(d) in hydroelectric power stations and thermal power stations, alternators produce electricity

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Updated on: Sep 23, 2022

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Physics (Lakhmir Singh)

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Question 39: Which one of the following statements about power stations is not true?

(a) hydroelectric power stations use water to drive turbines
(b) in a power station, turbines drive generators
(c) electricity from thermal power stations differs from that produced in hydroelectric power stations
(d) in hydroelectric power stations and thermal power stations, alternators produce electricity
11 mins ago
Discuss this question LIVE
11 mins ago

Text SolutionText solutionverified iconVerified

Answer: Electricity produced in a hydroelectric power station is similar to electricity produced in thermal power plants.
Therefore, the answer is,
(c) The electricity from a thermal power station differs from that produced in a hydroelectric power station.
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Q1
Question 38: Which of the following energy change involves frictional force?

(a) chemical energy to heat energy
(b) kinetic energy to heat energy
(c) potential energy to sound energy
(d) chemical energy to kinetic energy
Q2
Question 39: Which one of the following statements about power stations is not true?

(a) hydroelectric power stations use water to drive turbines
(b) in a power station, turbines drive generators
(c) electricity from thermal power stations differs from that produced in hydroelectric power stations
(d) in hydroelectric power stations and thermal power stations, alternators produce electricity
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Question 41: An object is falling freely from a height x. After it has fallen a height , it will possess :

(a) only potential energy
(b) only kinetic energy
(c) half potential and half kinetic energy
(d) less potential and more kinetic energy
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Question Text
Question 39: Which one of the following statements about power stations is not true?

(a) hydroelectric power stations use water to drive turbines
(b) in a power station, turbines drive generators
(c) electricity from thermal power stations differs from that produced in hydroelectric power stations
(d) in hydroelectric power stations and thermal power stations, alternators produce electricity
Updated OnSep 23, 2022
TopicWork and Energy
SubjectScience
ClassClass 9
Answer TypeText solution:1 Video solution: 1
Upvotes126
Avg. Video Duration6 min