The maximum displacement of a vibrating body from its mean position is called
- Afrequency
- Btime period
- ✓amplitude
- DNone of the above
Answer: C.
View full solution →Question types
Sound question types
139 questions across 8 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
139
Questions
8
Question groups
5
Question types
01
M.C.Q. [I MARKS]
30 Q→02Fill in the blanks: [1 M]
16 Q→03questions in short. [2 marks ]
31 Q→04true or false. [1 M]
17 Q→05questions in short. [3 marks ]
15 Q→06questions in details [4 marks ]
1 Q→07questions in on sentence. [1 M]
28 Q→08Match the Following.
1 Q→Sample Questions
Sound questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Ultrasound has frequency of vibration
- Abetween 20 and 20000 Hz
- Bbelow 20 Hz
- ✓above 20000 Hz
- Dbetween 500 and 10000 Hz
Answer: C.
View full solution →Loudness of sound is measured in units of
- ✓decibel (dB)
- Bhertz (Hz)
- Cmetre (m)
- Dmetre/second(m/s)
Answer: A.
View full solution →A list of mediums is given below
(i) Wood
(ii) Water
(iii) Air
(iv) Vacuum
In which of these mediums can sound travel?
(i) Wood
(ii) Water
(iii) Air
(iv) Vacuum
In which of these mediums can sound travel?
- A(i) and (ii)
- ✓(i), (ii) and (iii)
- C(iii) and (iv)
- D(ii), (iii) and (iv)
Answer: B.
View full solution →Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.
- A(i) and (ii)
- B(i), (ii) and (iii)
- C(ii), (iii) and (iv)
- ✓(i), (ii) and (iv)
Answer: D.
View full solution →The pitch of the sound depends on the __________.
Muscles attached to the vocal cords can make the cords __________ or __________.
The speed of sound in air is ____________.
A person having partial hearing loss can hear properly by using a device called ___________ aid.
Sound which is pleasing to our ears is called ____________.
Suggest three measures to limit noise pollution in your locality.
A simple pendulum makes 10 oscillations in 20 s. What is the time period and frequency of its oscillations?
We have learnt that vibration is necessary for producing sound. Explain why the sound produced by every vibrating body cannot be heard by us?
Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reasons.
Lightning can be seen at the moment when it occurs. Paheli observes lightning in her area. She hears the sound 5 s after she observed lightning. How far is she from the place where lightning occurs? (Speed of sound=330 m/s)
The sound waves produced by the bats are infrasonic
The sound travels fastest in the solids.
The speed of sound is more than the speed of light.
Man cannot hear the sound of bats.
Plantation along roadside can reduce noise pollution.
Given below are two graphic waves, which of the two indicates the one for noise and for music?
How is sound produced and how is it transmitted and heard by us?
An alarm bell is kept inside a vessel as shown in figure. A person standing close to it can distinctly hear the sound of alarm. Now, if the air inside the vessel is removed completely, how will the loudness of alarm get affected for the same person?
The figure shown in the diagram is the normal human ear. Observe the diagram carefully and answer the following questions.
(i) Name different parts of human ear.
(ii) What passes messages from the ear to the brain?
(iii) In which part of the ear is the eardrum located?
(i) Name different parts of human ear.
(ii) What passes messages from the ear to the brain?
(iii) In which part of the ear is the eardrum located?
How can the noise pollution be controlled in a residential area?
Sketch larynx and explain its functions in your own words.
When we hear a sound, does any part of our body vibrate? Name the part.
Name two musical instruments which produce sound by vibrating strings.
Name the sources in the home that may lead to noise.
Can you list some sources of noise pollution?
Is the sound always pleasing?
Column I | Column II |
(a) Audible frequency range | (i) More than 20 kHz |
(b) Normal breathing | (ii) 20 Hz to 20 kHz |
(c) Ultrasonic waves | (iii) 10 dB |
(d) Length of vocal cords in man | (iv) Frequency |
| (v) 20 mm long |
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