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Sound — Practice Quiz

ICSE · Class 8 · Physics

Try a 4-question quiz on Sound for ICSE Class 8 Physics: tap an answer to check it and see why. 166 questions in the full chapter test.

166 questions34 flashcards5 formulas & key relations5 concepts

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Quick Quiz: Sound

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

1

A sound wave has a time period of 0.25 s. What is its frequency?

2

A sound wave has a frequency of 50 Hz. What is its time period?

3

A sound wave has amplitude 2 cm. Another wave has amplitude 5 cm. What is the ratio of their loudnesses, taking the second wave to the first wave?

4

Two waves have amplitudes 3 cm and 6 cm. What is the ratio of their loudnesses, taking the second wave to the first wave?

166 Questions·
multiple choicetrue false

Sample Questions

1multiple choice
3 marks

A sound wave has amplitude 4 cm. If its amplitude is doubled, by what factor does its loudness change?

Show answer

4 times

Loudness is proportional to the square of amplitude. Doubling amplitude makes loudness 2^2 = 4 times.

2multiple choice
3 marks

A sound wave has amplitude 2 cm. If its amplitude is tripled, by what factor does its loudness change?

Show answer

9 times

Loudness ∝ a^2. Tripling amplitude makes loudness 3^2 = 9 times.

3multiple choice
3 marks

A tuning fork vibrates at 256 s^-1. What is its frequency in hertz?

Show answer

256 Hz

The frequency produced by the tuning fork is marked on it. 256 s^-1 means 256 Hz.

4multiple choice
3 marks

A tuning fork has a marked frequency of 480 s^-1. What is its frequency?

Show answer

480 Hz

The marked frequency is the frequency of the tuning fork. 480 s^-1 = 480 Hz.

+162 more questions on Sound (ICSE Class 8 Physics)

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Frequently Asked Questions

What are the important topics in Sound for ICSE Class 8 Physics?
Key topics in Sound include Sound as Energy and Its Propagation, Wave Terms and Relations, Loudness and Amplitude, Decibel Scale and Safe Sound Levels. Study these first, then practise questions on each for Class 8 exams.
How many practice questions are there for Sound?
There are 166 questions on Sound. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

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

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