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Important Questions

Sound — Important Questions

ICSE · Class 7 · Physics

70 important questions from Sound for ICSE Class 7 Physics, with answers. Includes multiple choice, multiple correct and true false questions.

70 questions38 flashcards6 formulas & key relations5 concepts

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70 Questions·
multiple choicemultiple correcttrue false

Important Questions from Sound

1multiple choice
3 marks

A sound travels 1500 m in water in 1 s. How many times faster is sound in water than in air if sound in air is 330 m/s?

Show answer

About 4.5 times

Speed in water = 1500 m/s and in air = 330 m/s. The ratio is 1500/330 ≈ 4.5. So sound is about 4.5 times faster in water.

2multiple choice
3 marks

Sound travels 5960 m in steel in 1 s and 330 m in air in 1 s. How much farther does sound travel in steel than in air in the same 1 s?

Show answer

5630 m

Subtract the distances covered in 1 s. 5960 m - 330 m = 5630 m.

3multiple choice
3 marks

A clock pendulum makes 1 vibration in 2 s. How many vibrations does it make in 10 s, and what is its frequency?

Show answer

5 vibrations, 0.5 Hz

If 1 vibration takes 2 s, then in 10 s the number of vibrations is 10/2 = 5. Frequency is 5/10 = 0.5 Hz.

4multiple choice
3 marks

A vibrating body completes 12 vibrations in 3 s. What is its frequency?

Show answer

4 Hz

Frequency = number of vibrations per second. So f = 12/3 = 4 Hz.

+66 more questions on Sound (ICSE Class 7 Physics)

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Frequently Asked Questions

What are the important topics in Sound for ICSE Class 7 Physics?
Key topics in Sound include Sound is produced when a body, Vibratory motion is an oscillatory motion, A tuning fork is a U, The larynx is also called. Study these first, then practise questions on each for Class 7 exams.
How many important questions are there in Sound?
Super Tutor has 70 practice questions for Sound, including multiple choice, multiple correct, true false questions. A sample with answers is on this page.

Sources & Official References

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

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All ICSE Class 7 Physics Important Questions

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