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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
5
Chapter 5: Sound
162 questions
Q1
Question 70:
If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be :
(a) 2
(b) 0.2
(c) 20
(d) 200
(a) 2
(b) 0.2
(c) 20
(d) 200
Q2
Question 71:
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing rang. This note must then be passing through.
(a) water
(b) wax
(c) vacuum
(d) empty vessel
(a) water
(b) wax
(c) vacuum
(d) empty vessel
Q3
Question 72:
Which one of the following does not consist of transverse waves?
(a) light emitted by a CFL
(b) TV signals from a satellite
(c) ripples on the surface of a pond
(d) musical notes of an orchestra
View all question(a) light emitted by a CFL
(b) TV signals from a satellite
(c) ripples on the surface of a pond
(d) musical notes of an orchestra
Question
Question 71:
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing rang. This note must then be passing through.
(a) water
(b) wax
(c) vacuum
(d) empty vessel
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Text solution
Verified
Answer:
Sound waves cannot propagate through vacuum.
Ans: (c) Vacuum.
Ans: (c) Vacuum.
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Practice more questions from Physics (Lakhmir Singh)
Q1
Question 70:
If the speed of a wave is 340 m/s and its frequency is 1700 Hz, then λ for this wave in cm will be :
(a) 2
(b) 0.2
(c) 20
(d) 200
(a) 2
(b) 0.2
(c) 20
(d) 200
Q2
Question 71:
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing rang. This note must then be passing through.
(a) water
(b) wax
(c) vacuum
(d) empty vessel
(a) water
(b) wax
(c) vacuum
(d) empty vessel
Q3
Question 72:
Which one of the following does not consist of transverse waves?
(a) light emitted by a CFL
(b) TV signals from a satellite
(c) ripples on the surface of a pond
(d) musical notes of an orchestra
View all(a) light emitted by a CFL
(b) TV signals from a satellite
(c) ripples on the surface of a pond
(d) musical notes of an orchestra
Practice questions from Physics (Lakhmir Singh)
Question 1
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Question 4
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Practice more questions from Sound
Practice questions on similar concepts asked by Filo students
Question 1
Views: 5,263
The following graph describes the motion of a girl going to meet her friend who stays 50 m away from her house. How much time did she take to reach her friend’s house? What is the distance travelled by the girl during the time interval-0 to 12 min? During which time interval is she moving towards her house? For how many minutes she was at rest, during the entire journey? Calculate the speed by which she returned home.
Question 2
Views: 5,644
Question 3
Views: 5,934
Question 4
Views: 5,640
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| Question Text | Question 71:
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing rang. This note must then be passing through. (a) water (b) wax (c) vacuum (d) empty vessel |
| Topic | Sound |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 |
| Upvotes | 59 |
