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Sound Science - Sound

Jharkhand Board (JAC) - STD 9 - Science (Jharkhand - English Medium). 207 questions in this chapter.

Question types

Sound question types

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

207
Questions
7
Question groups
5
Question types
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.

Q 1M.C.Q. [1 M]1 Mark
The speed of highly penetrating ultrasonic waves is:
  • A
    Lower than those of audible sound waves.
  • B
    Higher than those of audible sound waves.
  • C
    Much higher than those of audible sound waves.
  • ✓
    Same as those of audible sound waves.

Answer: D.

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Q 3M.C.Q. [1 M]1 Mark
The speeds of sound in four different media are given below. Which of the following is the most likely speed in m/s with which the two under water whales in a sea talk to each other when separated by a large distance?
  • A
    $340$
  • B
    $5170$
  • C
    $1280$
  • ✓
    $1530$

Answer: D.

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Q 4M.C.Q. [1 M]1 Mark
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through:
  • A
    Water.
  • B
    Wax.
  • ✓
    Vacuum.
  • D
    Empty vessel.

Answer: C.

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Q 5M.C.Q. [1 M]1 Mark
Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?
  • A
    Stretched strings.
  • B
    Stretched membranes.
  • ✓
    Metal plates.
  • D
    Air columns.

Answer: C.

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Q 6true or false1 Mark
State whether the following statement is true or false: Sound produced by a vibrating body travels to our ears by the actual movement of air.
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Q 29Que-Ans (Each of 5 Mark )5 Marks
Consider the following sound waves marked $A, B, C$ and $D:$
  1. Which two waves represent sounds of the same loudness but different pitch$?$
  1. Which two waves represent sounds of the same frequency but different loudness?
  1. State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies?
  1. Which vibrating body/bodies could have generated the sound waves shown here?
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Q 31Que-Ans (Each of 5 Mark )5 Marks
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below:
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200Hz.
  1. What happens to the air in-between Anhas and the loudspeaker?
  2. Explain how Anhad receives sound in both ears.
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