ICSE Worksheet for chapter-11 Sound class 10

Worksheet For class 10

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Summary

• Characteristics Of Sound - Loudness And Intensity
• Pitch And Frequency
• Quality
• Sound Intensity
• Music And Noise

Section 1 - Objective

Q1. By reducing the amplitude of a sound wave, its:

1. Pitch increases
2. Loudness decreases
3. Loudness increases
4. Pitch decreases

Q2. Two sounds A and B are of frequencies f and 2f respectively. Then:

1. Both sounds are identical
2. B is grave, A is shrill
3. B is shrill, A is grave
4. B is louder than A

Q3. Two sounds of same loudness and same pitch produced by two different instruments differ in their :

1. Amplitudes
2. Frequencies
3. Wave forms
4. All the above

Q4. The unit of quantity on which pitch of the sound depends is:

1. Hertz
2. Meter
3. Meter/ second
4. Second

Q5. The unit of quantity on which loudness of sound depends is:

1. Meter
2. Hertz
3. Zero
4. Infinite

Q6. Pitch of high frequency sound is:

1. High
2. Low
3. Zero
4. Infinite

Q7. Voice of a friend is recognized by its:

1. Pitch
2. Quality
3. Intensity
4. Velocity

Q8. When sound waves travelling in air enter into the medium of water, the quantity which remains unchanged is:

1. Wavelength
2. Velocity
3. Frequency
4. None

Section 2 - Subjective

• Q1. Name the unit in which loudness of sound is measured
• Q2. Define the term intensity of a sound wave. State the unit in which it is measured
• Q3. How is loudness of sound related to the intensity of wave producing it ?
• Q4. State the factors that determine
  1. The pitch of a note
  2. The loudness of the sound heard
  3. The quality of the note
• Q5. Name the subjective property of
  1. Sound related to its frequency
  2. Light related to its wavelength
• Q6. Which characteristic of sound will change if there is a change in its amplitude and waveform
  1. Name one factor which affects the frequency of sound emitted due to vibrations in air column.
  2. Name the unit used for measuring the sound level.

Solutions: to worksheet-11 Topic-Sound

Objective

Subjective

Ans 1. Photon

Ans 4. Frequency

• Amplitude
• Wave form

Ans 5. Pitch

Colour

Ans 6. Loudness and Timbre

• Length of air column
• Decibel