By reducing the amplitude of a sound wave, its:
Pitch increases
Loudness decreases
Loudness increases
Pitch decreases
Question types
Sound question types
169 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
169
Questions
6
Question groups
5
Question types
01
[1 Mark Question Answer]
43 Q→02[2 Mark Question Answer]
44 Q→03[3 Mark Question Answer]
15 Q→04[5 Mark Question Answer]
15 Q→05MCQ
44 Q→06fill in the blanks.
8 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.
View full solution →
Define the term intensity of a sound wave. State the unit in which it is measured.
Why is the loudness of the sound heard by a plucked wire increased when it is mounted on a sound board?
Name the unit in which loudness of sound is measured.
Two waves of the same pitch have amplitudes in the ratio 1:3. What will be the ratio of frequencies?
Two sounds A and B are of same amplitude, same wave forms but of frequencies f and 2f respectively. Then:
B differs in quality from A
B is grave, A is shrill
B is shrill, A is grave
B is louder than A
Two sounds of same loudness and same pitch produced by two different instruments differ in their:
Amplitudes
Frequencies
Waveforms
All of the above.
How is loudness of sound related to the intensity of wave producing it?
How does the wave pattern of a loud note differ from a soft note? Draw a diagram.
State one difference between a musical note and a noise.
Shows the wave patterns of three sounds A, B and C. Name the characteristic of sound which is same between (i) A and B, (ii) B and C, and (iii) C and A.
Name three characteristics of a musical sound.
Draw a diagram to show the wave pattern of high pitch note and a low pitch note, but of the same loudness.
The bells of a temple are big in size. Why?
State three factors on which loundess of sound heard by a listener depends.
How does the two sounds of same loudness and same pitch produced by different instruments differ? Draw diagrams to illustrate your answer.
The diagram below shows three different modes of vibration P, Q and R of the same string of a
givens length.
(a) Which vibration will produce a louder sound and why?
(b) Which vibration will produce sound of maximum shrillness (or pitch) and why?
(c) What is the ratio of wavelength of vibrations P and R?
givens length.
(a) Which vibration will produce a louder sound and why?
(b) Which vibration will produce sound of maximum shrillness (or pitch) and why?
(c) What is the ratio of wavelength of vibrations P and R?
Comment on the statement ‘loudness of sound is a subjective quantity, while intensity is an objective quantity.
How do you tune your radio set to a particular station?
Why are the stringed instruments like guitar provided with a hollow sound box?
The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to:
- A10 m
- ✓17 m
- C34 m
- D50 m
Answer: B.
View full solution →Which of the following graph shows the ideal condition for natural vibration.
- ✓
- B
- C
- D
Answer: A.
View full solution →Bats detect obstacles in their path by producing:
- AInfrasonic waves
- ✓Ultrasonic waves
- CElectromagnetic waves
- DRadio waves
Answer: B.
View full solution →For effective reflection of sound waves, the condition of the surface should be:
- AThe surface must be smooth
- BThe surface must be polished
- ✓The reflecting surface must be larger than the wavelength of the sound wave
- DThe reflecting surface must be smaller than the wavelength of the sound wave
Answer: C.
View full solution →As the temperature of a gas increases, the speed of sound:
- ADecreases
- ✓Increases
- CRemains the same
- DCannot say
Answer: B.
View full solution →If the amplitude of a sound is halved, its loudness becomes ………………
Complete the following sentence:
The pitch of sound increases if its frequency …………..
The pitch of sound increases if its frequency …………..
Complete the following sentence:
Resonance is a special case of …………….. vibrations, when frequency of the driving force is ……… natural frequency of the body.
Resonance is a special case of …………….. vibrations, when frequency of the driving force is ……… natural frequency of the body.
Amount of sound energy emitted per unit area normal to the surface is ___________ [loudness/pitch/echo] .
SONAR is a technique used to __________ [determine the size of blue whale/detect the impurities present in sea water/detect the depth of sea bed].
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