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Federal (FBISE) · Chapter test · Free

10th Class Physics Chapter 4 Test13. Sound

30 marks · 40 minutes · 21 questions. Covers: 13. Sound.

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10th Class Physics Chapter 4 Test

10th Class · Physics · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. Infrasonic waves have frequency.
    1. greater than 20 Hz
    2. less than 20 Hz
    3. of 20 Hz
    4. of 20 kHz
  2. Sound waves are:
    1. Transverse in nature
    2. Longitudinal in nature
    3. Electromagnetic
    4. None of these
  3. SONAR stands for:
    1. Sound Navigation and Ranging
    2. Sound Notation and Recording
    3. Sound Node and Receiver
    4. Signal Navigation and Radar
  4. Noise from construction sites is produced by:
    1. Birds
    2. Excavation and road work
    3. Music
    4. Trees
  5. Noise pollution can be reduced by:
    1. Turning off appliances when not in use
    2. Planting more trees
    3. Using earplugs
    4. All of these
  6. Resonance control in acoustics means:
    1. Avoiding amplification of certain sounds
    2. Increasing loudness
    3. Increasing reverberation
    4. Producing echoes
  7. The speed of sound in steel is approximately:
    1. 500 m/s
    2. 1000 m/s
    3. 5000 m/s
    4. 10,000 m/s
  8. The instrument used to detect infrasound is called:
    1. Seismograph
    2. Infrasound sensor
    3. Microphone
    4. Oscilloscope
  9. Sensitivity of the human ear has direct relation with:
    1. Pitch
    2. Loudness
    3. Frequency only
    4. Quality
  10. Which part of the ear converts vibrations into fluid waves?
    1. Eardrum
    2. Cochlea
    3. Ossicles
    4. Auditory nerve

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. Which nerve carries electrical signals to the brain?
  2. Which animals use infrasound for communication?
  3. How does temperature affect refraction of sound waves?
  4. What is meant by the source of sound?
  5. Define noise.
  6. Define loudness of sound.
  7. What is the speed of sound in air at room temperature?
  8. How do carpets and curtains reduce noise?

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Humans can hear frequencies from approximately 20 Hz to 20,000 Hz. Analyze how sounds outside this range (infrasound and ultrasound) are utilized in nature and technology. What are the implications of these frequencies for human hearing?
  2. Explain the phenomenon of an echo as the reflection of sound waves. Design an experiment to measure the time delay of an echo, and discuss how this can be used to determine distances in various applications, such as sonar.
  3. Differentiate between noise and music? Explain that how is noise nuisance?