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Sound Waves Characteristics and Applications — Practice Quiz

CBSE · Class 9 · Science

Try a 4-question quiz on Sound Waves Characteristics and Applications for CBSE Class 9 Science: tap an answer to check it and see why.

77 questions80 flashcards5 formulas & key relations5 concepts

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An illustration showing a block being pulled by a constant force F at an angle theta to the horizontal displacement S, with the formula W = F ⋅ S = FS cosθ.
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Quick Quiz: Sound Waves Characteristics and Applications

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

A sound wave travels in a medium with wavelength 3 m and frequency 120 Hz. What is its speed?

2

A sound wave has speed 340 m/s and frequency 20 Hz. What is its wavelength?

3

A sound wave in steel has speed 5000 m/s and wavelength 50 m. What are its frequency and time period?

4

A sound wave has 18 oscillations in 6 seconds. What are its frequency and time period?

77 Questions·
multiple choicemultiple correcttrue falseassertion reasoningnumerical

Sample Questions

1multiple choice
3 marks

A sonar signal returns after 0.80 s. If the speed of sound in water is 1500 m/s, how far is the object from the sonar?

Show answer

600 m

The 0.80 s is round-trip time. One-way time = 0.80 / 2 = 0.40 s. Distance = speed × time = 1500 × 0.40 = 600 m.

2multiple choice
3 marks

An echo is heard 0.6 s after shouting near a wall. If the speed of sound in air is 340 m/s, what is the distance from the wall?

Show answer

102 m

The sound travels to the wall and back in 0.6 s. One-way time = 0.6 / 2 = 0.3 s. Distance = 340 × 0.3 = 102 m.

3multiple choice
3 marks

A sound wave moves with speed 344 m/s and frequency 20000 Hz. What is its wavelength?

Show answer

0.0172 m

Use λ = v / ν = 344 / 20000 = 0.0172 m.

4multiple choice
3 marks

Sound travels 340 m in 1 second in air. How far does it travel in 0.1 s, and what is the minimum echo distance from the wall?

Show answer

34 m and 17 m

Distance in 0.1 s = 340 × 0.1 = 34 m. This is the round-trip distance. Minimum wall distance = 34 / 2 = 17 m.

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Frequently Asked Questions

What are the important topics in Sound Waves Characteristics and Applications for CBSE Class 9 Science?
Key topics in Sound Waves Characteristics and Applications include Production and Propagation of Sound, Wave Nature, Energy, and Graphical Terms, Speed of Sound and Its Dependence on Medium, Human Hearing, Pitch, Loudness, and Voice. Study these first, then practise questions on each for Class 9 exams.
How many practice questions are there for Sound Waves Characteristics and Applications?
There are 77 questions on Sound Waves Characteristics and Applications. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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