Physics
Class 9
Lakhmir Singh
1
Chapter 1: Motion
117 questions
2
Chapter 2: Force and Laws of Motion
114 questions
3
Chapter 3: Gravitation
157 questions
4
Chapter 4: Work and Energy
128 questions
Q1
Question 13:
Name the device which converts electrical energy into mechanical energy.
Q2
Question 14:
Name the devices or machines which convert :
(a) Mechanical energy into electrical energy.
(b) Chemical energy into electrical energy.
(c) Electrical energy into heat energy.
(d) Light energy into electrical energy.
(e) Electrical energy into light energy.
(a) Mechanical energy into electrical energy.
(b) Chemical energy into electrical energy.
(c) Electrical energy into heat energy.
(d) Light energy into electrical energy.
(e) Electrical energy into light energy.
Q3
Question 15:
Name the devices or machines which convert :
(i) Electrical energy into sound energy.
(ii) Heat energy into kinetic energy (or mechanical energy).
(iii) Chemical energy into kinetic energy (or mechanical energy).
(iv) Chemical energy into heat energy.
(v) light energy into heat energy.
View all question(i) Electrical energy into sound energy.
(ii) Heat energy into kinetic energy (or mechanical energy).
(iii) Chemical energy into kinetic energy (or mechanical energy).
(iv) Chemical energy into heat energy.
(v) light energy into heat energy.
5
Chapter 5: Sound
162 questions
Question
Question 14:
Name the devices or machines which convert :
(a) Mechanical energy into electrical energy.
(b) Chemical energy into electrical energy.
(c) Electrical energy into heat energy.
(d) Light energy into electrical energy.
(e) Electrical energy into light energy.
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Text solution
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Answer:
(a) An electric generator converts mechanical energy into electrical energy.
(b) A cell, or battery, converts chemical energy into electrical energy.
(c) An electric iron converts electrical energy into heat energy.
(d) A solar cell converts light energy into electrical energy.
(e) An electric bulb converts electrical energy into light energy.
(b) A cell, or battery, converts chemical energy into electrical energy.
(c) An electric iron converts electrical energy into heat energy.
(d) A solar cell converts light energy into electrical energy.
(e) An electric bulb converts electrical energy into light energy.
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Practice more questions from Physics (Lakhmir Singh)
Q1
Question 13:
Name the device which converts electrical energy into mechanical energy.
Q2
Question 14:
Name the devices or machines which convert :
(a) Mechanical energy into electrical energy.
(b) Chemical energy into electrical energy.
(c) Electrical energy into heat energy.
(d) Light energy into electrical energy.
(e) Electrical energy into light energy.
(a) Mechanical energy into electrical energy.
(b) Chemical energy into electrical energy.
(c) Electrical energy into heat energy.
(d) Light energy into electrical energy.
(e) Electrical energy into light energy.
Q3
Question 15:
Name the devices or machines which convert :
(i) Electrical energy into sound energy.
(ii) Heat energy into kinetic energy (or mechanical energy).
(iii) Chemical energy into kinetic energy (or mechanical energy).
(iv) Chemical energy into heat energy.
(v) light energy into heat energy.
View all(i) Electrical energy into sound energy.
(ii) Heat energy into kinetic energy (or mechanical energy).
(iii) Chemical energy into kinetic energy (or mechanical energy).
(iv) Chemical energy into heat energy.
(v) light energy into heat energy.
Practice questions from Physics (Lakhmir Singh)
Question 1
Views: 6,267
Question 2
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Question 3
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(a) chemical energy to heat energy
(b) kinetic energy to heat energy
(c) potential energy to sound energy
(d) chemical energy to kinetic energy
Practice more questions from Work and Energy
Question 1
Medium
Views: 5,189
Question 2
Hard
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Question 3
Views: 5,244
Question 4
Views: 5,570
(b) A body is thrown vertically upwards. Its velocity goes on decreasing. What happens to its kinetic energy as its
velocity becomes zero?
(c) A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, what
is the ratio of their kinetic energies?
Practice questions on similar concepts asked by Filo students
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| Question Text | Question 14:
Name the devices or machines which convert : (a) Mechanical energy into electrical energy. (b) Chemical energy into electrical energy. (c) Electrical energy into heat energy. (d) Light energy into electrical energy. (e) Electrical energy into light energy. |
| Updated On | Sep 4, 2022 |
| Topic | Work and Energy |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 198 |
| Avg. Video Duration | 8 min |
