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Acoustics Science - Acoustics

Tamil Nadu Board - STD 10 - Science (Tamil - English Medium). 39 questions in this chapter.

Question types

Acoustics question types

39 questions across 7 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

39
Questions
7
Question groups
5
Question types
Sample Questions

Acoustics questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 11Assertion & Reason1 Mark
Assertion: The velocity of sound increases with increase in humidity.
Reason: Velocity of sound does not depend upon the medium.

  • A
    both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    both assertion and reason are true but reason is not the correct explanation of the assertion.
  • ✓
    Assertion is true but reason is false.
  • D
    Assertion is false but the reason is true.

Answer: C.

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Q 12Assertion & Reason1 Mark
Assertion: Sound wave cannot propagate through a vacuum but light can.
Reason: Sound wave cannot be polarised but light can.

  • A
    Both assertion and reason are true and the reason is the correct explanation of the assertion.
  • ✓
    Both assertion and reason are true but the reason is not the correct explanation of the assertion.
  • C
    Assertion is true but the reason is false.
  • D
    Both assertion and reason are false.

Answer: B.

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Q 19[2 Mark Questions]2 Marks
Consider a source moving towards a listener at a speed of 0.9 v. Where v is the velocity of sound. Calculate the apparent frequency if the actual frequency is 600 Hz.
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Q 22[4 Mark Questions]4 Marks
What is the Doppler effect? Derive the formula for the change in apparent frequency
1. Both source and listener move towards and away from each other.
2. Both source and listener move one behind the other source follows the listener and listener follows the source.
3. A source at rest, listener moves towards and away from the source.
4. A listener at rest, the source moves towards and away from the listener.
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Q 26Match The Following.4 Marks
Waves Range
(i) Audible (a) 340 m/s
(ii) Sound (b) greater than 20kHz
(iii) Infrasonic (c) 20Hz – 20 kHz
(iv) Light (d) below 20 Hz
(v) Ultrasonic (e) $3 \times 10^8 m / s$
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