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Important Questions

Sound

ICSE · Class 7 · Physics

Most important questions from Sound for ICSE Class 7 Physics board exam 2026. MCQs, short answer, and long answer questions with marks.

70 questions38 flashcards5 concepts

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70 Questions·
multiple choicemultiple correcttrue false

Sample Questions

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.

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Frequently Asked Questions

What are the important topics in Sound for ICSE Class 7 Physics?
Sound covers several key topics that are frequently asked in ICSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Sound — ICSE Class 7 Physics?
Understand the core concepts first, then work through the 70 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Sound?
There are 70 practice questions available for Sound. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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